analysis of new product diffusion using a four segment trial repeat model a four segment trial repeat model is developed to model sales of a frequently purchased product in the early stage of the product s life cycle the model can be calibrated using aggregate data alone two versions of the model one emphasizing the competitive aspect of marketing communications and another emphasizing the informative aspect are estimated from data on 21 newly launched pharmaceutical products the model provides valuable diagnostics such as an early estimate of the long run market share of the new product a decomposition of total sales into trial sales due to marketing activities trial sales due to word of mouth and repeat sales the changing composition of the trial market and repeat market over time and the time when the trial market is expected to be saturated in addition the effectiveness of the entrant s marketing efforts word of mouth communication and buyers trial experience are analyzed with the model a cross sectional analysis based on the empirical estimation results of our model reveals interesting insights into product introduction strategies we find that 1 the effectiveness of the firms communication activities on trial is related mainly to product quality attributes and market growth whereas that of word of mouth is associated with product class characteristics and market competitiveness and 2 the effect of product trial on repeat purchases is related mainly to product quality attributes and various market characteristics such as size growth competitiveness and familiarity

inventory and credit decisions for time varying deteriorating items with up stream and down stream trade credit financing by discounted cash flow analysis abstract in today s competitive markets most firms in united kingdom and united states offer their products on trade credit to stimulate sales and reduce inventory trade credit is calculated based on time value of money on the purchase cost i e discounted cash flow analysis recently many researchers use discounted cash flow analysis only on the purchase cost but not on the revenue which is significantly larger than the purchase cost and the other costs for a sound and rigorous analysis we should use discounted cash flow analysis on revenue and costs in addition expiration date for a deteriorating item e g bread milk and meat is an important factor in consumer s purchase decision however little attention has been paid to the effect of expiration date hence in this paper we establish a supplier retailer customer supply chain model in which a the retailer receives an up stream trade credit from the supplier while grants a down stream trade credit to customers b the deterioration rate is non decreasing over time and near 100 percent particularly close to its expiration date and c discounted cash flow analysis is adopted for calculating all relevant factors revenue and costs the proposed model is an extension of more than 20 previous papers we then demonstrate that the retailer s optimal credit period and cycle time not only exist but also are unique thus the search of the optimal solution reduces to a local one finally we run several numerical examples to illustrate the problem and gain managerial insights

energy consumption and economic development in sub sahara africa sub saharan african countries economic development is dependent on energy consumption this paper assesses total energy demand which is composed of traditional energy wood fuel and commercial energy electricity and petroleum in the central east south and west regions of sub saharan africa cross sectional time series data for 20 countries in 25 years are analyzed and the results of the study show that wood fuel accounts for 70 of energy consumption followed by petroleum with most industrial activities utilizing some form of wood fuel regression results suggest that energy demand is inversely related to the price of petroleum and industrial development but positively related to gdp population growth rate and agricultural expansion and that price elasticity is less than one the model results also show that there are regional differences in energy demand in addition the interaction of population growth rates by regions generates mixed results and there are regional differences in the use of commercial energy consumption and gdp growth the findings of this study suggest that countries must diversify their energy sources and introduce energy efficient devices and equipment at all levels of the economy to improve gdp growth rate and gdp per capita

determinants of electricity consumption function in pakistan old wine in a new bottle abstract the objective of the study is to re investigate the multivariate electricity consumption function for pakistan particularly economic growth foreign direct investment and population growth over a 36 year time period i e between 1975 and 2010 the study employed the bounds testing procedure for cointegration which examines the short run and long run estimates dynamic short run causality test is applied to determine the causality direction between electricity consumption and its determinants by using wald f statistics the results reveal that determinants of electricity consumption function are cointegrated and influx of foreign direct investment income and population growth is positively related to electricity consumption in pakistan however the intensity of these determinants is different on electricity consumption if there is 1 increase in income foreign direct investment and population growth electricity consumption increases by 0 973 0 056 and 1 605 respectively this infers that income foreign direct investment and population growth induce an increase in electricity consumption in pakistan dynamic short run causality test indicates that there has been unidirectional causality which is running from population growth to electricity consumption in pakistan

competitive pricing by a price leader we examine the problem of pricing in a market where one brand acts as a price leader we develop a procedure to estimate a leader s price rule which is optimal given a sales target objective and allows for the inclusion of demand forecasts we illustrate our estimation procedure by calibrating this optimal price rule for both the leader and the follower using data on past sales and prices from the mid size sedan segment of the u s automobile market our results suggest that a leader follower system stackelberg seems more consistent with the pricing behavior in this market than a mutually independent pricing rule nash we also find that our optimal price rule explains this market data better than other pricing schemes that do not account for optimizing behavior on the part of the leader and the follower

pricing and lot sizing polices for perishable goods when the demand depends on selling price displayed stocks and expiration date abstract price is a major factor on the demand based on marketing and economic theory in addition the demand for perishable products also depends on its freshness moreover it is a well known fact that increasing stock display e g fresh fruits vegetables baked goods may encourage consumers to purchase more this paper first proposes an inventory model that stipulates the demand explicitly in a multivariate function of price freshness and displayed stocks it may be profitable to have a closeout sale at a markdown price and always keep on hand displayed stocks fresh and plentiful if the demand is freshness and stock dependent hence the traditional assumption of zero ending inventories is relaxed to a non zero ending inventory as a result the objective is to determine three decision variables i e unit price cycle time and ending inventory level in order to maximize the total profit then it is demonstrated that the total profit is strictly pseudo concave in those three decision variables which reduces the search for solutions to a unique local maximum finally numerical examples to illustrate the theoretical results and to highlight managerial insights are presented

coal consumption and economic growth evidence from a panel of oecd countries this study examines the relationship between coal consumption and economic growth for 25 oecd countries within a multivariate panel framework over period 1980 2005 the larsson et al 2001 panel cointegration test indicates there is a long run equilibrium relationship between real gdp coal consumption real gross fixed capital formation and the labor force the respective coefficients for real gross fixed capital formation and the labor force are positive and statistically significant whereas the coefficient for coal consumption is negative and statistically significant the results of the panel vector error correction model reveal bidirectional causality between coal consumption and economic growth in both the short and long run however the bidirectional causality in the short run is negative

the relationship between gdp and electricity consumption in 10 asian countries the purpose of this study is to estimate the relationships between gdp and electricity consumption in 10 newly industrializing and developing asian countries using both single data sets and panel data procedures the empirical results from single data set indicate that the causality directions in the 10 asian countries are mixed while there is a uni directional short run causality running from economic growth to electricity consumption and a bi directional long run causality between electricity consumption and economic growth if the panel data procedure is implemented these empirical findings imply that electricity conservation policies through both rationalizing the electricity supply efficiency improvement to avoid the wastage of electricity and managing demand side to reduce the electricity consumption without affecting the end user benefits could be initiated without adverse effect on economic growth the findings on the long run relationship indicate that a sufficiently large supply of electricity can ensure that a higher level of economic growth

determinants of energy consumption function in saarc countries balancing the odds abstract the objective of the study is to investigate the multivariate energy consumption function for south asian association for regional cooperation saarc countries namely bangladesh india nepal pakistan and srilanka particularly economic growth gdp relative prices of energy rep foreign direct investment fdi and different financial development indicators i e broad money supply liquid liabilities domestic credit provided by banking sector and domestic credit to private sector over a period of 1975 2011 the results reveal that granger causality running from all other variables to fdi which indicates a strong support for the hypothesis that energy consumption ec gdp rep and fd are important determinants in promoting the fdi both in short and long run in the context of bangladesh the results suggest for india indicate that gdp fdi rep and fd are useful in explaining the movements of ec in the short run similarly the granger causality results indicate that ec gdp rep and fd are the important determinants of fdi in case of nepal rep is the only variable whose movements in the short run determined by movements in the other four variables i e gdp fdi ec and fd however the ec also provide useful information about the variable fd the results of pakistan indicate the causal relationship among fdi and ec which supports the feedback hypothesis in the short and long run similarly both variables i e fdi and gdp supports the feedback hypothesis both in the long run and short run where as fd and ec fd and rep fdi and rep and finally rep and gdp supports the feedback hypothesis in the short run in case of srilanka this study did not find any strong support of the causality among the variables either in the short or long run except unidirectional granger causality running from fd to ec and ec to fdi

economic growth and electricity consumption in cote d ivoire evidence from time series analysis this paper examines the causal relationship between the electric power industry and the economic growth of cote d ivoire using the data from 1971 to 2008 a test was conducted for the cointegration and granger causality within an error correction model results from these tests reveal a bidirectional causality between per capita electricity consumption and per capita gdp a unidirectional causality running from electricity consumption to industry value added appears in the short run economic growth is found to have great effects on electricity consumption and a reverse causality from electricity to economic growth may also appear in the long run there is a unidirectional causality between electricity and both gdp and industry value added from these findings we conclude that the country will be energy dependent in the long run and must therefore secure the production network from shortfalls to ensure a sustainable development path accordingly government should adopt policies aimed at increasing the investment in the sector by stepping up electricity production from existing and new energy sources

optimal strategies for general price quality decision models of new products with learning production costs abstract the question of product quality permeates every level of business and is becoming crucial for the survival of modern manufacturing firms in automotive and high tech industries in this paper we deal with the optimal price and quality policies for the introduction of a new product on the supply side the firm wants to determine the unit price and quality level over time given that unit cost declines along a learning curve and increases if quality is made greater on the demand side dynamic demand is related to price and quality as well as to cumulative sales which represent diffusion and saturation effects we will model this problem in a general framework that includes several previous results as special cases by applying the maximum principle we will derive the optimal price and quality policies and discover the interactions between these two major strategic marketing instruments and the diffusion process several fundamental theoretical results will be established for the model under certain specified conditions higher prices do imply higher quality and under other conditions the optimal price declines over time while the product quality improves to illustrate these results the theoretical results are applied to two specific cases the first one is a simple nonseparable demand growth function in price and quality the other is a separable demand function of price and quality

an econometric study of co2 emissions energy consumption income and foreign trade in turkey abstract this study attempts to empirically examine the dynamic causal relationships between carbon emissions energy consumption income and foreign trade in the case of turkey using the time series data for the period 1960 2005 this research tests the interrelationship between the variables using the bounds testing to cointegration procedure the bounds test results indicate that there exist two forms of long run relationships between the variables in the case of first form of long run relationship carbon emissions are determined by energy consumption income and foreign trade in the case of second long run relationship income is determined by carbon emissions energy consumption and foreign trade an augmented form of granger causality analysis is conducted amongst the variables the long run relationship of co2 emissions energy consumption income and foreign trade equation is also checked for the parameter stability the empirical results suggest that income is the most significant variable in explaining the carbon emissions in turkey which is followed by energy consumption and foreign trade moreover there exists a stable carbon emissions function the results also provide important policy recommendations

modeling multiattribute utility risk and belief dynamics for new consumer durable brand choice this paper proposes a brand choice model to aid in the prelaunch management of a new consumer durable entry in an existing category the model contributes to theory by integrating the critical phenomena of multiattribute preference risk and dynamics in an individual level expected utility framework the integration is based on established theoretical constructs in utility bayesian decision analysis and discrete choice theory measurement and estimation procedures are presented an application is described and the managerial relevance of this work as a planning and forecasting tool is examined

price competition and compatibility in the presence of positive demand externalities in many cases the benefit to a consumer of a product increases with the number of other users of the same product these demand interdependencies are referred to in the literature as positive demand externalities or network externalities this paper examines the dynamic pricing behaviors of an incumbent and a later entrant with special attention to the impacts of demand externalities compatibility and competition on prices and profits defining market power as the ability to price above a competitor without losing market share we show how demand externalities and installed base combine to confer market power we model optimal pricing as a differential game with the optimal price trajectory established as nash open loop controls for a duopoly durable goods market with strong demand externalities the results show an increasing price trajectory can be optimal as expected a new entrant is better off if its products are compatible with those of the incumbent especially when demand externalities are strong and the installed base of the incumbent is large less intuitively the incumbent as well may be better off agreeing on common standards the comparison of monopoly and duopoly shows that under strong demand externalities and a small installed base the incumbent profits from compatible entry

a new product growth for model consumer durables this article originally appeared in management science january 1969 volume 15 number 5 pp 215 227 published by the institute of management sciences a growth model for the timing of initial purchase of new products is developed and tested empirically against data for eleven consumer durables the basic assumption of the model is that the timing of a consumer s initial purchase is related to the number of previous buyers a behavioral rationale for the model is offered in terms of innovative and imitative behavior the model yields good predictions of the sales peak and the timing of the peak when applied to historical data a long range forecast is developed for the sales of color television sets

the european commission s sustainable consumption and production and sustainable industrial policy action plan abstract the promotion of sustainable consumption and production patterns is enshrined as a key objective in the renewed european union sustainable development strategy eu sds sustainable consumption and production is arguably the most challenging aspect of the eu sds it requires changes to the way products and services are designed produced used and disposed of taking into account producer and consumer behaviours this paper reviews the european commission s communication on the sustainable consumption and production and sustainable industrial policy action plan introduced on july 16 2008 the paper examines the priority areas identified for action the means adopted to improve energy and environmental performance of products as well as uptake by consumers the paper concludes that the absence of mandatory quantifiable targets and deadlines and a reliance on both cross sectoral and multi level relationships are likely to weaken the ability of the action plan s fundamental objective of decoupling economic growth from resource use

electricity consumption employment and real income in australia evidence from multivariate granger causality tests this paper examines the relationship between electricity consumption employment and real income in australia within a cointegration and causality framework we find that electricity consumption employment and real income are cointegrated and that in the long run employment and real income granger cause electricity consumption while in the short run there is weak unidirectional granger causality running from income to electricity consumption and from income to employment

nonlinear production path and an alternative reserves estimate for south asian natural gas abstract natural gas is a finite resource that may be estimated directly through geophysical methodologies or indirectly through historical production data the rapid growth in consumption of this limited natural resource strictly connected to the oil economy may lead to its imminent depletion and a related economic crisis the transition to a new economy based on renewable and sustainable energy resources is a crucial challenge for the next decades at world and regional levels with different dynamics therefore an accurate forecast of the availability of natural gas is important to ensure a sustainable energy policy providing essential information about the timing of this transition postulating a finite life cycle of recoverable resources in this paper we investigate the natural gas production of four neighboring south asian states bangladesh india myanmar and pakistan we use a number of homogeneous diffusion models with convenient extensions and check the model validation in terms of prediction capability the results indicate that india and myanmar have already extracted more than 50 of their ultimately recoverable natural gas resources urr whereas good prospects for natural gas extraction remain in the near future for bangladesh and pakistan the four neighboring asian states can build a sustainable power reserve system for natural gas to meet their increasing demand within a medium term horizon some further policy implications are also suggested in this paper

investigating the sensitivity of equilibrium profits to advertising dynamics and competitive effects the author investigates the validity of the flat maximum principle the insensitivity of a firm s profits to changes in its optimal advertising level in a duopolistic market in which advertising by the two firms has carryover effects two alternative competitive scenarios are examined i in which total industry sales are allowed to vary over time and ii where firms are engaged in market share rivalry for i the open loop nash equilibrium advertising strategies for the firms are derived assuming a specific sales response function and an infinite time horizon a numerical analysis of the sensitivity of firms profit functions to advertising expenditures is performed at different levels of the a discount rate b advertising elasticity and c advertising decay rate an empirical illustration from the pharmaceutical industry is provided special cases of the model formulation are examined analytically in order to highlight the intuition behind the flatness of the maximum and to study the sensitivity of results obtained to choice of equilibrium strategy closed loop vs open loop for the market share game closed loop policies are considered and the flat maximum principle is illustrated in the context of coke pepsi rivalry in the soft drinks market

integrating deterioration and lifetime constraints in production and supply chain planning a survey abstract items with short lifetimes that are subject to deterioration are important in the business world research has a long tradition in integrating deterioration and value loss effects into mathematical models for inventory planning and control where such effects are understood as a general loss or shrinkage of inventory however there has been little work in the modeling of lifetime restrictions of items to prevent wastage and disposals especially in a dynamic planning context globalization and other trends extend the consideration of single companies to whole supply chains implying increased coordination and information needs this is important as planning decisions impact lead times and thus the quality of items in the whole supply chain products that exceed their useful lifetime can impose high costs due to inventory loss or the need to rework them this implies increased utilization of scarce resources e g machine time metals and or energy thereby increasing co 2 levels we survey the state of the art regarding depreciation effects and the modeling of lifetime constraints as well as a classification of models following business planning functions of the value chain a critical evaluation of approaches and their limitations is provided highlighting directions for future research

inventory models with ramp type demand rate partial backlogging and weibull deterioration rate in this paper an inventory model with general ramp type demand rate time dependent weibull deterioration rate and partial backlogging of unsatisfied demand is considered the model is studied under the following different replenishment policies a starting with no shortages and b starting with shortages the model is fairly general as the demand rate up to the time point of its stabilization is a general function of time the backlogging rate is any non increasing function of the waiting time up to the next replenishment the optimal replenishment policy for the model is derived for both the above mentioned policies

optimal pricing and advertising in a durable good duopoly abstract this paper analyzes dynamic advertising and pricing policies in a durable good duopoly the proposed infinite horizon model while general enough to capture dynamic price and advertising interactions in a competitive setting also permits closed form solutions we use differential game theory to analyze two different demand specifications linear demand and isoelastic demand for symmetric and asymmetric competitors we find that the optimal price is constant and does not vary with cumulative sales while the optimal advertising is decreasing with cumulative sales comparative statics for the results are presented

decomposition of co2 emissions change from energy consumption in brazil challenges and policy implications this study evaluates the changes in co2 emissions from energy consumption in brazil for the period 1970 2009 emissions are decomposed into production and consumption activities allowing computing the full set of energy sources consumed in the country this study aims to develop a comprehensive and updated picture of the underlying determinants of emissions change from energy consumption in brazil along the last four decades including for the first time the recently released data for 2009 results demonstrate that economic activity and demographic pressure are the leading forces explaining emission increase on the other hand carbon intensity reductions and diversification of energy mix towards cleaner sources are the main factors contributing to emission mitigation which are also the driving factors responsible for the observed decoupling between co2 emissions and economic growth after 2004 the cyclical patterns of energy intensity and economy structure are associated to both increments and mitigation on total emission change depending on the interval the evidences demonstrate that brazilian efforts to reduce emissions are concentrated on energy mix diversification and carbon intensity control while technology intensive alternatives like energy intensity has not demonstrated relevant progress residential sector displays a marginal weight in the total emission change

understanding the role of energy consumption in human development through the use of saturation phenomena a correlation is presented between the un human development index and per capita energy consumption for 120 nations a strong relationship between index values and energy consumption is observed for the majority of the world additionally a distinct secondary trend emerges from the dataset representing heavy energy exporters such as the organization of the petroleum exporting countries and some former soviet union nations among others the preliminary observation is made that these two trends closely resemble saturation curves exhibited by a variety of natural phenomena for the primary trend three regions are isolated a steep rise in human development relative to energy consumption for energy poor nations a moderate rise for transitioning nations and essentially no rise in human development for energy advantaged nations consuming large amounts of modern energy these correlations suggest that tremendous gains in human development are possible for the world s poorest with small incremental access to energy

vertical cooperative advertising and pricing decisions in a manufacturer retailer supply chain a game theoretic approach abstract manufacturers can increase the advertising expenditures of their retailers by bearing a fraction of the occurring costs within the framework of a vertical cooperative advertising program we expand the existing research which deals with advertising and pricing decisions in a manufacturer retailer supply chain contemporaneously by means of game theory four different relationships between the channel members are considered firstly three non cooperative games with either symmetrical distribution of power or asymmetrical distribution with one player being the leader in each case and one cooperative game where both players tend to maximize the total profit the latter is complemented by a bargaining model which proposes a fair split of profit on the basis of the players risk attitude and bargaining power our main findings are as follows a in contrast to previous analyses we do not limit the ratio between manufacturer s and retailer s margin which provides more general insights into the effects of the underlying distribution of power within the channel b the highest total profit is gained when both players cooperate this behavior puts also the customers in a better position as it produces the lowest retail price as well as the highest advertising expenditures compared to the other configurations

review of inventory systems with deterioration since 2001 abstract this paper presents an up to date review of the advances made in the field of inventory control of perishable items deteriorating inventory the last extensive review on this topic dates back to 2001 goyal s k and giri b c recent trends in modeling of deteriorating inventory european journal of operational research 134 1 16 since then over two hundred articles on this subject have been published in the major journals on inventory control indicating the need for a new review we use the classification of goyal and giri based on shelf life characteristics and demand characteristics contributions are highlighted by discussing main system characteristics including price discounts backordering or lost sales single or multiple items one or two warehouses single or multi echelon average cost or discounted cash flow and payment delay

climate change adaptation a study of fuel choice and consumption in the us energy sector abstract using cross sectional data this paper estimates a national energy model of fuel choice by both households and firms consumers in warmer locations rely relatively more heavily on electricity rather than natural gas oil and other fuels they also use more energy climate change will likely increase electricity consumption on cooling but reduce the use of other fuels for heating on net american energy expenditures will likely increase resulting in welfare damages that increase as temperatures rise for example if the us warms by 5 c by 2100 we predict annual welfare losses of 57 billion

stochastic dynamic pricing and advertising in isoelastic oligopoly models abstract in this paper we analyze stochastic dynamic pricing and advertising differential games in special oligopoly markets with constant price and advertising elasticity we consider the sale of perishable as well as durable goods and include adoption effects in the demand based on a unique stochastic feedback nash equilibrium we derive closed form solution formulas of the value functions and the optimal feedback policies of all competing firms efficient simulation techniques are used to evaluate optimally controlled sales processes over time this way the evolution of optimal controls as well as the firms profit distributions are analyzed moreover we are able to compare feedback solutions of the stochastic model with its deterministic counterpart we show that the market power of the competing firms is exactly the same as in the deterministic version of the model further we discover two fundamental effects that determine the relation between both models first the volatility in demand results in a decline of expected profits compared to the deterministic model second we find that saturation effects in demand have an opposite character we show that the second effect can be strong enough to either exactly balance or even overcompensate the first one as a result we are able to identify cases in which feedback solutions of the deterministic model provide useful approximations of solutions of the stochastic model

dynamics of competing with quality and advertising based goodwill goodwill formation is a complex process and many factors influence the formation of goodwill of a firm the implications of advertising enabled goodwill formation are reported in several articles in the research literature in this paper we extend this stream of research by including quality in the goodwill formation process we adopt a dynamic model of competition utilizing a differential game approach and derive expressions for open loop markovian nash equilibrium investments in advertising and quality the insights gained from the analysis of our model and from the equilibrium solutions are presented in the form of research propositions

international perceptions of cost constraints on voluntary information disclosures a comparative study of u k and u s multinationals the main purpose of this paper is to examine the cost constraints on voluntary information disclosure in a comparative study of the perceptions of financial executives in u k and u s multinationals the study examines the perceived net costs or benefits of disclosing information voluntarily the types of costs involved and the significance of cost constraints in respect of specific items of disclosure the results suggest that while there is substantial agreement on the major cost constraints involved and the individual items giving rise to major net costs there are significantly different perceptions by u k and u s financial executives in terms of the overall emphasis of responses to the issue of cost constraints on voluntary information disclosures

competitive advertising strategies and market size dynamics a research note on theory and evidence this paper analyzes competing firms advertising strategies in markets characterized by dynamic market sizes for new product innovations a large literature has been developed on the basis of the celebrated bass diffusion process which captures what we call market size dynamics however in spite of the significant literature incorporating competitiveness into the bass model few if any analytical results have been obtained especially those with normative implications on the other hand important theoretical and empirical insights have recently been obtained using the famous lanchester warfare model of competition in which market share dynamics are governed by advertising activities for mature products whose market sizes are typically fixed or stable our paper seeks to address the issue of optimal advertising strategies incorporating both market share dynamics and market size dynamics in doing so we seek to take advantage of the theoretical and normative insights currently available in the lanchester formulation for mature products to obtain normative analytical results on competitive advertising strategies for new product innovations whose markets evolve around the bass process we first obtain analytical solutions to the problem at hand and offer theoretical implications for competitive advertising on the bass diffusion model the models parameters are then estimated using a set of data on sales and advertising expenditures of polaroid corp and eastman kodak co in instant photography during the 19761985 period optimal trajectories for the firms advertising spending are then calculated and other marketing and managerial implications of optimal advertising strategies are explored

optimal order quantity and selling price over a product life cycle with deterioration rate linked to expiration date it is evident that the lower the price the higher the demand therefore price is an important factor in a consumer s purchasing decision additionally for today s health conscious consumers product freshness is another important factor in purchasing decisions since product freshness declines over time today s health conscious consumers prefer a perishable product with a longer sell by date to a shorter one moreover a product s demand rate moving through its life cycle can be approximately represented by a trapezoid type pattern which includes constant demand increasing demand and decreasing demand as special cases in existing literature several researchers have developed inventory models for trapezoidal demand however they failed to consider pricing strategy product freshness linked to expiration date and purchasing cost in this study we enhance previous models by 1 taking pricing into consideration 2 exploring deterioration rate linked to expiration date and 3 adding an appropriate non constant purchasing cost we then derive theoretical results and run numerical examples to obtain managerial insights for instance the total profit without purchasing cost is significantly lower than that with purchasing cost included also if the cost of lost sales is improperly low then the total profit may become negative due to a large amount of lost sales

environmental kuznets curve for carbon emissions in pakistan an empirical investigation this study investigates the relationship between carbon emissions income energy consumption and foreign trade in pakistan for the period 1972 2008 by employing the johansen method of cointegration the study finds that there is a quadratic long run relationship between carbon emissions and income confirming the existence of environmental kuznets curve for pakistan moreover both energy consumption and foreign trade are found to have positive effects on emissions the short run results have however denied the existence of the environmental kuznets curve the short run results are unique to the existing literature in the sense that none of the long run determinants of emissions is significant the contradictory results of short and long run give policy makers the opportunity to formulate different types of growth policies for the two terms taking environmental issues into consideration in addition the uni directional causality from growth to energy consumption suggests that the policy makers should not only focus on forecasting future demand for energy with different growth scenarios but also on obtaining the least cost energy furthermore the absence of causality from emissions to growth suggests that pakistan can curb its carbon emissions without disturbing its economic growth

coordinating advertising and pricing in a manufacturer retailer channel abstract cooperative advertising is a practice that a manufacturer pays retailers a portion of the local advertising cost in order to induce sales cooperative advertising plays a significant role in marketing programs of channel members nevertheless most studies to date on cooperative advertising have assumed that the market demand is only influenced by advertising expenditures but not by retail price this paper addresses channel coordination by seeking optimal cooperative advertising strategies and equilibrium pricing in a two member distribution channel we establish and compare two models a non cooperative leader follower game and a cooperative game we develop propositions and insights from the comparison of these models the cooperative model achieves better coordination by generating higher channel wide profits than the non cooperative model with these features a the retailer price is lower to consumers and b the advertising efforts are higher for all channel members we identify the feasible solutions to a bargaining problem where the channel members can determine how to divide the extra profits

retracted factors affecting commercial energy consumption in pakistan progress in energy the purpose of this study is to identify major macroeconomic factors that enhance energy consumption for pakistan through the cointegration error correction model and granger causality tests over a 32 year time period i e between 1980 and 2011 the study employed the bivariate cointegration technique to estimate the long run relationship between the variables an error correction model was used to determine the short run dynamics of the system while granger causality test was used to find the directions between these variables the study investigates the relation between four energy consumption variables i e oil petroleum consumption gas consumption electricity consumption and coal consumption and four macroeconomic factors which have further sub classifications i e balance of payment bop factors i e exports imports trade deficit worker s remittances and current account balance fuel factors i e carbon dioxide emissions natural resource depletion and net forest depletion agricultural crops yield per hectare i e wheat rice sugarcane maize and cotton and industrial production items i e beverages cigarettes motor tyres motor tubes cycle tyres and cycle tubes in order to manage robust data analysis the result confirms the long run relationship between total commercial energy consumption and macroeconomic factors in pakistan as oil petroleum consumption increases exports fuel factors agricultural crops yield per hectare and industrial items however the intensity of these factors are different in nature carbon dioxide emissions net forest depletion beverages motor tyres and motor tubes are more elastic with oil petroleum consumption however oil petroleum consumption decreases trade deficit and workers remittances in pakistan gas electricity and coal consumption increases agricultural crops yield per hectare and industrial production which shows that as agriculture and industry modernizes energy demand increases energizing the food production chain is an essential feature of agricultural development which is a prime factor in helping to achieve food security in pakistan the empirical results only moderately support the conventional view that energy consumption has significant long run casual effect on macroeconomic variables in pakistan the present study finds evident of unidirectional causality between the commercial energy consumption factors and macroeconomic factors in pakistan however there is some bidirectional causality exist which is running between electricity consumption ec and exports ec to imports ec to carbon emissions ec to natural resource depletion nrd and ec to wheat the results conclude that macroeconomic variables tend to positively respond to total primary energy consumption this indicates that increasing total commercial energy consumption may cause growth variables which show that pakistan is an input driven economy

examining carbon emissions economic growth nexus for india a multivariate cointegration approach abstract the study probes cointegration and causality between carbon emissions and economic growth for india using ardl bounds testing approach complemented by johansen juselius maximum likelihood procedure in a multivariate framework by incorporating energy supply investment and employment for time span 1971 2006 the study fails to establish long run equilibrium relationship and long term causality between carbon emissions and economic growth however there exists a bi directional short run causality between the two hence in the short run any effort to reduce carbon emissions could lead to a fall in the national income this study also establishes unidirectional short run causality running from economic growth to energy supply and energy supply to carbon emissions the absence of causality running from energy supply to economic growth implies that in india energy conservation and energy efficiency measures can be implemented to minimize the wastage of energy across value chain such measures would narrow energy demand supply gap absence of long run causality between carbon emissions and economic growth implies that in the long run focus should be given on harnessing energy from clean sources to curb carbon emissions which would not affect the country s economic growth

the validation of granger causality through formulation and use of finance growth energy indexes abstract the paper aims to investigate the finance growth energy nexus validity in pakistan by taking large range of relevant variables and developing indexes focus of the paper is to evaluate the long run relationship between financial development economic development and energy consumption after extracting the indices granger s ordinary least squares ols regression and correlation is used to explain short run deviation in the nexus in order to capture co integration eagle granger approach is applied lastly hurst exponent are used to estimate annual rescaled range statistics to explain deviation during period of analysis granger causality has been empirically tested in a robust way incorporating large range of relevant variables on overall nexus of finance growth energy that has been hardly tested in such depth index formation through econometric analysis is novel part of this study which revealed that in short run financial development index fdi and energy price have significant relationship with energy consumption however in long run analysis has endorsed the concept of granger casualty especially on feedback hypothesis study has practical and theoretical contribution to the literature that could be highly beneficial to policy makers

energy crisis greenhouse gas emissions and sectoral growth reforms repairing the fabricated mosaic abstract the study examined energy crisis and sought solutions for reforms in the largest regions of the world i e east asia pacific europe and central asia latin america the caribbean south asia and sub saharan africa the study used number of growth related factors over the period of 1975 2012 the results indicate significant relationship between electric power shortage and growth related specific factors however the intensity for each factor varies from region to region the results of granger causality verify multiple cause effect channels in the different regions i e feedback hypothesis economic factors driven electric shortage electric shortage driven economic factors and no causal relationship between the variables the results of variance decomposition analysis indicate that greenhouse gas emissions exhibit the largest contribution due to shortages in the electric power transmission the study opens the debate for environmentalists government and non government officials to formulate the sustainable policies related to energy reforms

the dynamic pricing of next generation consumer durables learning curve effects aspects of consumer demand models e g reservation price distributions intertemporal utility maximizing behavior and competitive activity are reasons which have been offered to explain why prices of new durables decline over time this paper presents an alternative rationale based on the buying behavior for products with overlapping replacement cycles i e next generation products a model for consumer sales of a new durable is developed by incorporating the replacement behavior of a previous generation product pricing strategies for two product generations are investigated analytically and with numerical methods results indicate that durable replacement behavior leads to a wider set of optimal pricing strategies than previously obtained several empirical illustrations of industry pricing practices for successive product generations are also shown to be consistent with the theoretical results finally various areas for future research are outlined

a diffusion model incorporating product benefits price income and information we start by assuming that a major benefit of many new durable products such as dishwashers and microwave ovens is time savings others such as vcrs also enhance the value of our leisure time using a household production framework we demonstrate that a utility maximizing individual will have a reservation price for the product which is a function of the product benefits and his wage rate by assuming that the wage rate has an extreme value distribution across the population we are able to derive for the aggregate process an income price dependent logistic adoption equation we then allow for the possibility that certain eligible consumers may delay their purchase of the product because they are unaware that it exists are suspicious of its quality or expect its price to fall unawareness uncertainty and hope for further price declines are assumed to decrease with the increase in the number of previous adopters the resulting diffusion model has the property that the product life cycle phenomenon can be explained jointly or separately by the income price process and the awareness uncertainty expectations process using data on household income on durable penetration within different income classes and on first purchase sales the aggregate diffusion model and its premises are tested and supported it is found that both the income price and awareness uncertainty expectations processes are at work however the dependence of the awareness uncertainty expectations delay process on the number of previous adopters e g word of mouth type effect exists only in certain product categories and is usually relatively weak it is demonstrated that if the word of mouth type effects are weak a price skimming strategy is optimal for a monopolist and also is likely to be implemented by oligopolists the sales forecasting implications of the model also are pursued

economic growth trade and energy implications for the environmental kuznets curve abstract the environmental kuznets curve ekc hypothesis asserts that pollution follows an inverted u path with respect to economic growth the ekc has been explained in terms of structural changes in the composition of economic output and increased environmental regulation at higher income levels while some authors have incorporated the impact of trade policy orientation on the ekc the impact of the actual movement between countries of goods that embody pollution has not been considered this paper attempts to econometrically quantify the effect using pooled cross country and time series data the ekc hypothesis is examined with respect to commercial energy consumption the source of many serious environmental problems it was found that while both industrializing and industrialized countries have added to their energy requirements by exporting manufactured goods the growth has been substantially higher in the former at the same time industrialized countries have been able to reduce their energy requirements by importing manufactured goods exports of manufactured goods by industrialized countries has thus been an important factor in generating the upward sloping portion of the ekc and imports by industrialized countries have contributed to the downward slope

inventory models for deteriorating items with maximum lifetime under downstream partial trade credits to credit risk customers by discounted cash flow analysis abstract getting loans from banks are almost impossible after 2008 global financial crisis as a result about 80 of companies in united kingdom and united states offer their products on various short term free interest loans i e trade credit to customers numerous researchers and academicians apply discounted cash flow dcf analysis merely to compute the interest earned and charged during the credit period but not to the revenue and other costs which are considerably larger than the interest earned and charged for a rigorous analysis the dcf on all relevant costs is applied in addition many products deteriorate continuously and cannot be sold after their maximum lifetimes or expiration dates however very few researchers and investigators have implemented the product lifetime expectance into their models in this paper a supplier retailer customer chain system is developed in which the retailer gets an upstream full trade credit from the supplier whereas offers a downstream partial trade credit to credit risk customers the deterioration rate is non decreasing over time and near 100 particularly close to its expiration date and dcf analysis is applied to compute all relevant costs this paper demonstrates that the retailer s optimal replenishment cycle time not only exists but also is unique thus the search of the global optimal reduces to finding a local solution finally several numerical examples and sensitivity analysis are performed in order to illustrate the problem and obtain managerial insights

a note on seller s optimal credit period and cycle time in a supply chain for deteriorating items with maximum lifetime in 2014 wang et al 2014 extended the model of lou and wang 2012 to incorporate the credit period dependent demand and default risk for deteriorating items with maximum lifetime however the rates of demand default risk and deterioration in the model of wang et al 2014 are assumed to be specific functions of credit period which limits the contributions in this note we first generalize the theoretical results of wang et al 2014 under some certain conditions furthermore we also present some structural results instead of a numerical analysis on variation of optimal replenishment and trade credit strategies with respect to key parameters

cointegration and causality between electricity consumption and gdp empirical evidence from malawi abstract the granger causality gc and error correction ecm techniques were applied on 1970 1999 data for malawi to examine cointegration and causality between electricity consumption kwh and respectively overall gdp agricultural gdp agdp and non agricultural gdp ngdp cointegration was established between kwh and respectively gdp and ngdp but not with agdp the gc results detect bi directional causality between kwh and gdp suggesting that kwh and gdp are jointly determined but one way causality running from ngdp to kwh the ecm results detect causality running one way from gdp also from ngdp to kwh suggesting that a permanent rise in gdp may cause a permanent growth in electricity consumption

diagnosing measurement equivalence in cross national research many researchers have pointed out that it is necessary to ensure measurement equivalence in cross national comparative research three aspects of measurement equivalence translation metric and calibration equivalence are necessary to establish the cross national reliability and validity of items used to measure theoretical constructs this paper discusses these issues and proposes two recently developed empirical techniques multiple group lisrel and optimal scaling for use in diagnosing cross national measurement equivalence these techniques are illustrated by reanalysis of a pioneering u s and japanese study the two techniques yield convergent results indicating measurement equivalence for some but not all ordinal level items under consideration the findings demonstrate that the proposed methods are useful diagnostic tools for exploring measurement equivalence several suggestions for reducing the likelihood of problems with measurement equivalence and a number of methods for dealing with items where lack of equivalence persists are also discussed

optimal advertising policies for diffusion models of new product innovation in monopolistic situations this paper deals with the determination of optimal advertising strategies for new product diffusion models we consider the introduction of a new consumer durable in a monopolistic market and the evolution of sales is modelled by a flexible diffusion model repeat sales and possible entry of rivals are disregarded but we allow for discounting of future revenue streams and cost learning curve using standard methods of optimal control theory we characterize qualitatively the structure of an optimal advertising strategy for different versions of the diffusion model

the effect of owner versus management control on the choice of accounting methods abstract this paper examines the relationship between the ownership control status of firms and the accounting methods they adopt the arguments of watts and zimmerman s positive theory are integrated with those of managerial economists to generate the prediction that management controlled firms are more likely than owner controlled firms to adopt accounting methods which increase reported earnings this prediction is inconsistent with fama s hypothesis that the market for managerial talent will prevent management controlled firms from acting differently than owner controlled firms this paper compares the depreciation methods used by a sample of management and owner controlled firms for financial reporting purposes the comparison considers and controls for the factors of firm size leverage and the depreciation method used for tax reporting purposes the comparison reveals that there is a significant difference in the depreciation methods adopted by management controlled and owner controlled firms for financial reporting purposes

energy consumption and economic growth in the light of meeting the targets of energy policy in the eu the bootstrap panel granger causality approach abstract the aim of the paper is to assess linkages between energy consumption and economic growth in the light of compliance with the eu energy policy targets stated in the climate and energy package for 2020 in the european union member states in the period 1993 2011 the study is divided into two main stages during the first one using cluster analysis methods four groups of countries which met three energy policy targets stated in the package at similar levels were identified during the second stage the bootstrap granger panel causality approach proposed by konya 2006 was used to verify the hypothesis of causality between energy consumption and economic growth in the countries from four groups created in the previous step the global financial crisis was also taken into account the results obtained reveal that the level of compliance with energy policy targets influences linkages between energy consumption and economic growth the results indicate causal relations in the group of countries with the greatest reduction of greenhouse gas emissions the highest reduction of energy intensity and the highest share of renewable energy consumption in total energy consumption in the remaining groups the results mostly confirm the neutrality hypothesis

the impact of competitive entry in a developing market upon dynamic pricing strategies this paper analyzes dynamic pricing strategies for new durable goods in a two period context the first period is characterized as a monopoly market structure for a new product having dynamic demand the second period begins when a new firm enters the market and thereby changes the market structure to a duopolistic one we begin by analyzing the pricing strategies of three types of monopolists nonmyopic myopic and surprised a nonmyopic monopolist is a first entrant who perfectly predicts the competitive entry a myopic monopolist totally discounts the duopolistic period and a surprised monopolist is a first entrant who has the longer time horizon of the nonmyopic monopolist but who does not foresee the competitive entry our results indicate that the nature of these pricing strategies may be quite different it is optimal for the nonmyopic firm to price its product at a higher level than the myopic monopolist additional results indicate under what circumstances the surprised monopolist will p

optimal pricing strategies for new products in dynamic oligopolies this paper deals with the determination of optimal pricing policies for firms in oligopolistic markets the problem is studied as a differential game and optimal pricing policies are established as nash open loop controls cost learning effects are assumed such that unit costs are decreasing with cumulative output discounting of future profits is also taken into consideration initially the problem is addressed in a general framework and we proceed to study some specific cases that are related to models presented in recent literature three basic classes of sales dynamics are analyzed competition with price effects only competition with price as well as adoption effects and competition with adoption effects only in some cases it turns out that results which hold for the monopoly case carry over to the multi firm case in the sense that the qualitative structure of optimal pricing strategies is the same in the monopoly and the oligopoly cases however due to competitive interdependencies differences certainly exist in the levels as well as the rates of change of optimal prices

the proposed introduction of current cost accounting in the u k determinants of corporate preference abstract this paper examines the corporate reaction to a major u k accounting proposal the 1976 exposure draft which called for the introduction of current cost accounting as the primary accounting convention written submissions to the u k rule making body are analyzed and four categories of preference identified probit analysis reveals that the expected cost of compliance is the most significant factor in shaping corporate preference in addition firms at risk of government investigation are more likely to support and service sector firms are more likely to oppose the proposed standard

nuclear energy consumption commercial energy consumption and economic growth in south asia bootstrap panel causality test abstract the objective of the study is to investigate the causal relationship among nuclear energy consumption commercial energy consumption i e oil consumption gas consumption electricity consumption and coal consumption and economic growth in south asian countries namely afghanistan bangladesh bhutan india maldives nepal pakistan and sri lanka over the period of 1975 to 2010 data is analyzed by bootstrap panel granger causality method the results reveal that nuclear energy consumption granger causes economic growth in nepal and pakistan while commercial energy consumption i e oil consumption granger causes economic growth in bangladesh bhutan maldives nepal and srilanka gas consumption granger causes economic growth in bangladesh bhutan india and maldives electricity consumption granger causes economic growth in india and srilanka finally coal consumption granger causes economic growth in bangladesh bhutan nepal and srilanka on the other side economic growth granger causes nuclear energy consumption in pakistan economic growth granger causes oil consumption in bhutan maldives and srilanka economic growth granger causes gas consumption in nepal srilanka and pakistan finally economic growth granger causes electricity consumption economic growth granger causes coal consumption in all south asian countries the findings show that the nature of causality between nuclear energy consumption economic growth and commercial energy consumption economic growth is in favor of the neutrality hypothesis in most of the countries

optimal dynamic advertising policy for new products advertising is one of the key marketing tools managers have at their disposal to influence their customers into purchasing a new product the overall objective of new product advertising is to inform and persuade customers drawing up an advertising plan for a new product that is under the influence of diffusion phenomenon is not an easy task hence research in this area is very limited in our research we use an empirically proven diffusion demand function that explicitly incorporates the advertising component our results suggest that optimal advertising is determined by the advertising effectiveness discount rate and the ratio of advertisement to profits depending upon the interplay among these factors the optimal advertising takes decrease increase increase decrease monotonically increasing or monotonically decreasing shape

what makes people adopt improved cookstoves empirical evidence from rural northwest pakistan abstract large dependence of the world population on biomass fuels for domestic energy consumption is one of the major anthropogenic causes of deforestation worldwide the use of biomass in inefficient ways in rural areas increases fuelwood demand of a household development of the improved biomass stove programs in the 1970s has been one of the efforts to reduce burden on biomass resource base through reliable and efficient methods of energy consumption however despite having multiple economic social environmental and health benefits the improved stove dissemination programs failed to capture worldwide recognition a wide array of socio cultural economic political and institutional barriers contributes to the low adoption rate of such programs drawing on field work surveys in rural northwest pakistan this paper provides empirical evidence of individual household and community level variables that play a vital role in the adoption of improved cookstoves the study is based on primary data collected from 100 randomly selected households in two villages of rural northwest pakistan using regression analysis the study depicts that education and household income are the most significant factors that determine a household willingness to adopt improved biomass stoves the study concludes that the rate of adoption could substantially be improved if the government and non governmental organizations ngos play a greater role in overcoming the social economic cultural political and institutional barriers to adopting improved cooking technologies

the relationship between agricultural technology and energy demand in pakistan abstract the purpose of this study was two fold i to investigate the casual relationship between energy consumption and agricultural technology factors and ii electricity consumption and technological factors in the agricultural sector of pakistan the study further evaluates four alternative but equally plausible hypotheses each with different policy implications these are i agricultural technology factors cause energy demand the conventional view ii energy demand causes technological factors iii there is a bi directional causality between the two variables and iv both variables are causality independent by applying techniques of cointegration and granger causality tests on energy demand i e total primary energy consumption and electricity consumption and agricultural technology factors such as tractors fertilizers cereals production agriculture irrigated land high technology exports livestock agriculture value added industry value added and subsides over a period of 1975 2010 the results infer that tractor and energy demand has bi directional relationship while irrigated agricultural land share of agriculture and industry value added and subsides have supported the conventional view i e agricultural technology cause energy consumption in pakistan on the other hand neither fertilizer consumption and high technology exports nor energy demand affect each others government should form a policy of incentive based supports which might be a good policy for increasing the use of energy level in agriculture

optimal trade credit and lot size policies in economic production quantity models with learning curve production costs abstract in reality a seller e g a supplier or a manufacturer frequently offers his her buyers trade credit e g permissible delay in payment trade credit reduces the buyer s holding cost of inventory and hence attracts new buyers who consider it to be a type of price reduction on the other hand granting trade credit also increases the seller s opportunity cost i e the loss of capital opportunity during the credit period and default risk i e the event in which the buyer will be unable to make the required payments on his her debt obligation in addition it is a well known fact of learning by doing that production cost of a new product declines by a factor of from 10 to 50 percent each time the accumulated production volume doubles therefore we propose an economic production quantity model from the seller s prospective to determine his her optimal trade credit period and production lot size simultaneously in which i trade credit increases not only sales but also opportunity cost and default risk and ii production cost declines and obeys a learning curve phenomenon then the necessary and sufficient conditions to obtain the seller s optimal trade credit and order quantity are derived finally we use some numerical examples to illustrate the theoretical results and to provide some managerial insights

electricity consumption and economic growth in india abstract this paper tries to examine the granger causality between electricity consumption per capita and gross domestic product gdp per capita for india using annual data covering the period 1950 51 to 1996 97 phillips perron tests reveal that both the series after logarithmic transformation are non stationary and individually integrated of order one this study finds the absence of long run equilibrium relationship among the variables but there exists unidirectional granger causality running from economic growth to electricity consumption without any feedback effect so electricity conservation policies can be initiated without deteriorating economic side effects

bidder discounts and target premia in takeovers on news of a takeover the sum of the stock market values of the firms involved often falls and the value of the acquirer almost always does does this mean that takeovers do not raise the values of the firms involved not necessarily we set up a model in which the equilibrium number of takeovers is constrained efficient yet upon news of a takeover a target s price rises the bidder s price falls and most of the time the joint value of the target and acquirer also falls

depletion of forest resources in sudan intervention options for optimal control agricultural expansion and over cutting of trees for fuelwood are important causes of deforestation in arid and semi arid countries such as sudan the consequence is increased desertification and high erosion and loss of soil nutrients leading to declining agricultural productivity however the social costs of the deforestation externality are not taken into account in present forest management and land use planning in sudan leading to under pricing and over exploitation of the country s forest resources this study evaluated the suitability of approaches commonly used by most forest resource management agencies for prediction of the state and control of harvesting of forest resources against alternative empirical simulation models using relevant information about economic behaviour of trading agents in the fuelwood market results showed the clear superiority of models integrating market behaviour over current approaches in the ability to better simulate real trends of wood consumption and hence depletion rates the study also adopted an optimal control model to derive socially optimal forest harvesting regimes the results showed that current rates of forest resource rent recovery and reforestation efforts are very far from optimal results also suggest that in addition to optimal pricing and higher reforestation efforts promotion and availability of fuel substitutes and investment in wood energy conversion efficiencies have a strong potential for curbing the problem of deforestation in sudan

disclosure decisions by firms and the competition for price efficiency this paper develops a model of the relationship between investment decisions by firms and the efficiency of the market prices of their securities it is shown that more efficient security prices can lead to more efficient investment decisions this provides firms with the incentive to increase price efficiency by voluntarily disclosing information about the firm disclosure decisions are studied it is shown that firms may expend more resources on disclosure than is socially optimal this is in contrast to the concern implicit in mandatory disclosure rules that firms will expend too few resources on disclosure this paper develops a model of the relationship between firms investment decisions and the efficiency of the market prices of their securities it is shown that more efficient security prices can lead to more efficient investment decisions this provides firms with the incentive to increase price efficiency by voluntarily disclosing information about the firm disclosure decisions are studied the costs of disclosure are twofold first there are costs of producing and disseminating the information included here are opportunity costs of firms employees auditing and legal expenses costs of printing and distribution and costs associated with the release of any proprietary information second there are traders costs of assimilating the information for instance while it is not very costly to obtain a firm s 8 k and 10 k once produced it is quite costly to understand the implications of their contents while the former costs have been recognized in the literature on disclosure the latter costs have not that is while traders are sometimes viewed as having access to some costly information the information contained in firms disclosures is typically taken to be costlessly observed by all see for instance diamond 1985 and dye 1987 1 taking traders costs of learning the information content of firms disclosures into account leads to new conclusions regarding incentives to expend resources on disclosure in particular it is shown that firms may spend more on disclosure than is socially optimal this overdisclosure results from firms competing for the attention of traders this is an interesting result given the public policy concern that firms on their own will spend less on disclosure than is socially optimal

myopic solutions to affine dynamic models new sufficient conditions are presented for a dynamic process to have a myopic optimum and for a sequential game to possess a myopic equilibrium point an optimum or an equilibrium point is said to be myopic if it can be specified by solving a static optimization problem or a static nash game the results are applied to an aquaculture harvesting model and a dynamic oligopoly model with advertising decisions

optimal pricing and advertising policies for new product oligopoly models in this paper our previous work on monopoly and oligopoly new product models is extended by the addition of pricing as well as advertising control variables these models contain bass s demand growth model and the vidale wolfe and ozga advertising models as well as the production learning curve model and an exponential demand function the problem of characterizing an optimal pricing and advertising policy over time is an important question in the field of marketing as well as in the areas of business policy and competitive economics these questions are particularly important during the introductory period of a new product when the effects of the learning curve phenomenon and market saturation are most pronounced we consider first the monopoly case with linear advertising cost exponential demand and three different pricing rules the optimal variable pricing the instantaneous marginal pricing and the optimal constant pricing rules several theoretical results are established for these rules including the facts that the instantaneous marginal pricing rule is a myopic version of the optimal pricing rule and the optimal constant pricing rule is a weighted average over time of the instantaneous marginal pricing rule another surprising result is that after the market is at least half saturated a pulse of advertising must be preceded by a significant drop in price numerical solutions of a number of examples are discussed oligopolistic models are analyzed as nonzero sum differential games in the rest of the paper the state and adjoint equations are easy to write down but impossible to solve in closed form hence we describe how to reformulate these models as discrete differential games and give a numerical algorithm for finding open loop nash solutions the latter was used to solve three triopoly models in each case it was found that optimal prices and advertising rates start high and steadily decline

lot sizing policies for deteriorating items with expiration dates and partial trade credit to credit risk customers abstract in practice a credit worthy retailer frequently receives a permissible delay on the entire purchase amount without collateral deposits from his her supplier i e an up stream full trade credit by contrast a retailer usually requests his her credit risk customers to pay a fraction of the purchase amount at the time of placing an order and then grants a permissible delay on the remaining balance i e a down stream partial trade credit in addition many products such as blood banks pharmaceuticals fruits vegetables volatile liquids and others deteriorate constantly and have their expiration dates however not many researchers have taken the expiration date of a deteriorating item into consideration the purpose of this paper is to establish optimal lot sizing policies for a retailer who sells a deteriorating item to credit risk customers by offering partial trade credit to reduce his her risk the proposed model is a generalized case of many previous models by applying theorems in pseudo convex fractional functions we can easily prove that the optimal solution not only exists but is also unique moreover we propose three discrimination terms which can easily identify the optimal solution among all possible alternatives finally some numerical examples are presented to highlight the theoretical results and managerial insights

the relationship between disaggregate energy consumption and industrial production in the united states an ardl approach abstract we re examine the relationship between disaggregate energy consumption and industrial output as well as employment in the united states using the autoregressive distributed lag ardl approach developed by pesaran and pesaran pesaran m h pesaran b 1997 working with microfit 4 0 camfit data ltd cambridge and pesaran shin and smith pesaran m h shin y smith r j 2001 bounds testing approaches to the analysis of level relationships journal of applied econometrics 16 289 326 in particular we focus attention on the following energy consumption variables coal fossil fuels conventional hydroelectric power solar energy wind energy natural gas wood and waste the sample period covers 2001 1 2005 6 our results imply that real output and employment are long run forcing variables for nearly all measures of disaggregate energy consumption

a simulation analysis of alternative pricing strategies for dynamic environments the implicit assumption of the classical economic model of price determination is that the firm maximizes short run profits however one of the key implications of strategy research of the past decade is that short run profit maximization is not an appropriate criterion for many market situations instead market share has been proposed as the key to long term profitability see e g buzzell gale and sultan 1974 abell and hammond 1979 this proposition has had a strong impact on both marketing practice and research hopkins 1981 reports that 88 of industrial firms surveyed spell out market share goals in detail the emphasis on market share in practice has been reflected in the theoretical side also where numerous market share forecasting and maximizing models have been published long term profitability has also become a research interest in its own right more than a dozen papers have appeared in major journals since 1975 the impetus to this activity has been the recognition of the existence of intertemporal effects in the environment for example on the demand side a consumer s purchasing in a given time period may preclude purchasing in the future because of the durability of the good or personal inventory loading on the supply side added current production early in new product introduction may reduce the cost of future proresearchers of the strategic implications of the well known demand e g adoption and diffusion and supply e g experience effects dynamics have typically sought analytical solutions their success in this has been achieved partly by limiting the richness of the dynamics considered this paper describes a simulation modeling capability simstrat which trades off analytical solutions for richer more realistic representations of supply and demand we present the model and then the results of our initial investigations using simstrat when joined with new computer graphics capabilities the model is successful in identifying conditions conducive to skimand penetration pricing strategies

econometric analysis of trade exports imports energy consumption and co2 emission in six regions abstract the aim of this study is to explore the bi directional long run relationship between trade energy consumption trade co 2 emission exports energy consumption exports co 2 emission imports energy consumption and imports co 2 emission 189 countries from six different regions namely asia pacific eastern europe the americas middle east and north africa mena sub saharan africa ssa and western europe were selected the panel fully modified ols fmols was utilized taking the period of 1990 2011 the panel results show that all the regions excluding eastern europe show a long run positive relationship between the trade variables energy consumption and between the trade variable co 2 emission however at the country level the results reveal that the feedback long run positive relationship between the trade variables energy consumption and co 2 emission takes place in most cases when the share of trade of goods and services to gdp is significant and the level of the countries development is high however the negative or the non significant long run relationship between the variables takes place generally in countries when the trade variables do not play a large share in their gdp and when these countries are in early development stages

energy sustainability from analysis of sustainable development indicators a case study in taiwan abstract as taiwan has a dense population and only limited natural resources the government began actively establishing a taiwan s sustainable development indicators tsdi system in 2003 which was developed with reference to the pressure state response psr framework to evaluate the progress towards sustainability energy is a very important factor in leading to sustainable development at the national level however there are only two indicators concerning the energy sustainability in the tsdi system this paper summarizes the current status of energy supply energy consumption carbon dioxide co 2 emissions and renewable energy production since the year 2000 the updated information on the tsdi was also addressed and analyzed to imply the progress towards energy sustainability during 2000 2008 finally the weighted sum method was proposed to make an analysis of energy sustainability from taiwan s renewable energy production showing that this country has experienced a significant progress toward energy sustainability in recent years

competition strategy and price dynamics a theoretical and empirical investigation the authors explore how competition affects dynamic pricing of new products dynamics of diffusion saturation and cost reduction due to experience are all considered with emphasis on the last t

co2 emissions energy consumption and output in france abstract this paper examines the dynamic causal relationships between pollutant emissions energy consumption and output for france using cointegration and vector error correction modelling techniques we argue that these variables are strongly inter related and therefore their relationship must be examined using an integrated framework the results provide evidence for the existence of a fairly robust long run relationship between these variables for the period 1960 2000 the causality results support the argument that economic growth exerts a causal influence on growth of energy use and growth of pollution in the long run the results also point to a uni directional causality running from growth of energy use to output growth in the short run

disaggregate energy consumption and industrial production in south africa abstract this paper tries to assess the relationship between disaggregate energy consumption and industrial output in south africa by undertaking a cointegration analysis using annual data from 1980 to 2005 we also investigate the causal relationships between the various disaggregate forms of energy consumption and industrial production our results imply that industrial production and employment are long run forcing variables for electricity consumption applying the toda h y yamamoto t 1995 statistical inference in vector autoregressions with possibly integrated processes journal of econometrics 66 225 250 technique to granger causality we find bi directional causality between oil consumption and industrial production for the other forms of energy consumption there is evidence in support of the energy neutrality hypothesis there is also evidence of causality between employment and electricity consumption as well as coal consumption causing employment

oligopoly models for optimal advertising when production costs obey a learning curve business policy questions frequently involve competitive encounters among several different firms oligopoly theory in economics was devised to answer similar questions but its results so far are largely confined to cases of monopoly one firm duopoly two firms and many firms wheat farmers the cases with n firms where 3 n 10 are of great interest to business policy but are rarely treated in the economics literature because of their extreme difficulty the natural mathematical model for studying such questions is the theory of differential games originally devised by r isaacs isaacs r 1975 differential games robert e krieger publishing co huntington new york originally published by john wiley sons new york 1965 for pursuer evader games later it was extended by j case case j h 1979 economics and the competitive process new york university press new york to nonzero sum differential games for application to questions of economic competition the problem of characterizing an optimal advertising policy over time is an important question in the field of marketing it is especially important during the period of the introduction of a new product and it is also during this time that the production learning curve phenomenon is most pronounced in this paper we study oligopoly models which combine elements of bass s demand growth model bass f m 1969 a new product growth model for consumer durables management sci 15 january 215 227 the vidale wolfe vidale m l h b wolfe 1957 an operations research study of sales response to advertising oper res 5 370 381 and ozga ozga s 1960 imperfect markets through lack of knowledge quart j econom 74 29 52 advertising models with linear or quadratic costs and the production learning curve hirschmann w p 1964 profit from the learning curve harvard bus rev 42 january february 125 139 the boston consulting group 1972 perspectives on experience the boston consulting group boston in the monopoly case n 1 the optimal advertising function is derived by applying green s theorem in the duopoly n 2 and triopoly n 3 cases we use discrete differential game models and find nash equilibrium solutions in each of these models the form of the optimal policy is easy to find but because of the complicated nature of the resulting differential equations closed form solutions for the optimal state and control trajectories are impossible to find hence we use a computer to compute these optimal trajectories and plot them for various parameter settings because 13n parameters must be chosen to define a model with n players a complete search of the parameter space is clearly impossible we content ourselves in this paper with presenting computer plots of four different interesting encounters of the triopoly model our methods can be extended to work just as well for competitive encounters among n players where 1 n 10 we believe that in this paper we have opened up the way to studying oligopoly theory with a small number of participants and under widely varying conditions although the lack of closed form solutions may disappoint some readers we feel that the easy availability of graphical solutions is a more than adequate substitute

investment and harvest strategies of the finnish forest sector under different forest tax policies a differential game approach with computer based decision aid abstract this study deals with the simultaneous solution of the investment harvest and taxation problems of the finnish forest sector these strategic questions involve competitive and contradictory interests among forestry the forest industry and society we build a computer based decision aid to support a decision maker who wants to analyze the consequences of different forest tax policies it is essential to this computational approach that only minor mathematical manipulations are needed to produce equilibrium open loop nash harvest and investment strategies moreover as a differential game approach it allows us to study the tax incidence we solve our model under three alternative tax policies lump sum unit and yield taxes

monopolist pricing with dynamic demand and production cost this paper deals with pricing of a new product over time by a monopolist who maximizes the discounted profit stream the interdependency of cost and demand on cumulative production makes the problem inherently dynamic cost is assumed to be declining with cumulative production learning curve effect while demand is a function of price and cumulative sales representing word of mouth and saturation effects the paper addresses this problem in a general framework that includes several previous results as special cases and provides new insights in other situations while the learning curve and word of mouth effect cause prices to be lower than the price that maximizes immediate revenues the saturation factor has the opposite effect the price path over time is affected by these factors and the interest rate we characterize the price path under several different situations and interpret the results for policy guidelines