product and price competition in a duopoly this paper examines the role of consumer preferences costs and price competition in determining the competitive product strategy of a firm in the model studied here there are two identical firms competing on product quality and price they face consumers who prefer a higher quality product to a lower quality product but differ in how much they are willing to pay for quality the consumers can also choose a substitute if they don t like the product price offerings of the two firms for the firms a higher quality product costs more to produce than a lower quality product the paper shows that the equilibrium strategy for each firm should be to differentiate its product from its competitor with the firm choosing the higher quality choosing the higher margin as well this differentiation however is not efficient that is it is possible to choose two other products and offer them at prices that cover their marginal cost and still satisfy consumers needs better in the aggregate a monopolist by contrast would differentiate his product line efficiently this suggests that cannibalization has different effects on product strategy than competition the paper also shows that if one firm enters the market first then it can defend itself from later entrants and gain a first mover advantage by preempting the most desirable product position

optimization of manufacturing systems under environmental considerations for a greenness dependent demand abstract in this work we show that the optimization models for manufacturing systems should evolve to consider the environmental impacts of manufacturing activities and to integrate the environmental performance of finished products in particular the selection of manufacturing processes technologies and input items components should be revised with environmental consideration with this scope in mind we develop two optimization models where we consider the selection of production processes and the choice of input products in the first model a single product is offered by the firm and the demand of this product depends on its greenness in the second model the market is segmented between ordinary and green customers and the firm offers a different variety of the output product to each segment in this case both the demand and the price depend on the product greenness in both models the greenness of the output product is a decision variable that is simultaneously determined along with the other decisions in addition the models integrate environmental legislations we conduct numerical experiments on a case study from the textile sector in order to show how the integration of the product greenness impacts on the system profit and decisions

determining the optimal carbon tax rate based on data envelopment analysis carbon tax policy is widely used to control greenhouse gases and how to determine a suitable carbon tax rate is very important for policy makers considering the trade off between environmental protection and economic development in an industry regulated by carbon tax policy we consider two competing firms who sell ordinary products and green products respectively in order to promote the firm who sells ordinary product to reduce carbon emissions the government of china imposes carbon tax on the ordinary products for the government three objectives are considered when it makes carbon tax policy they are increasing the government revenue reducing the government expenditure and decreasing the carbon emissions for the firms it is important to explore their pricing strategies taken into account of the government tax policy to find an optimal carbon tax rate and to achieve the three objectives simultaneously we consider this as a multiple criteria decision making problem hence we propose to use a centralized data envelopment analysis dea approach to solve it we find that when one firm produces ordinary products and the other produces green products the government may set a high tax rate while when both firms sell ordinary products the optimal tax policy for each firm is different and the government may impose a higher tax rate for one firm and a lower tax rate for the other firm

contract designs for energy saving product development in a monopoly abstract we discuss two types of contracts for energy saving products in a monopoly with the government s budget constraint these contracts specify the subsidy either a fixed amount referred to as f type contracts or a discount referred to as d type contracts and the threshold of the energy consumption level of products below which the products are labeled as certified products and qualified for the subsidy we model a three stage game and give optimal design of the contracts under two different objectives of the government minimizing the total energy consumption and minimizing the average energy consumption our results show that 1 the optimal contract designs are the same under the two objectives 2 if the subsidy budget is relatively low the f type contract is more preferable than the d type contract and vice versa 3 the contracts function of certification enables the government to take the advantage of the consumer environmental awareness to improve the environmental performance even when the government s subsidy budget is zero 4 both contracts benefit the environment under the f type contract only the government pays for the environmental improvement in contrast under the d type contract both the government and consumers pay

research advances in environmentally and socially sustainable operations abstract consumers and governments are pressuring firms to strike a balance between profitability and sustainability however this balance can only be maintained in the long run if the firm can take a holistic approach to sustain the financial flow profit resource flow planet and development flow people for the entire ecosystem comprising poor producers in emerging developing markets global supply chain partners consumers in developed countries and the planet by considering the flows associated with different entities within the ecosystem we classify and summarize recent operations research management science or ms research developments also we identify several gaps for future research in this important area

fiscal implications of aids in south africa abstract the number of people living with hiv is alarmingly large in addition to the incomprehensible human suffering of those directly affected aids also has large negative economic effects in this paper i study the fiscal implications of the hiv aids epidemic in south africa in a standard neo classical growth model i find that an antiretroviral program is to a large extent self financing improvement in dependency ratios and health care cost savings would pay for rand 144 billion of a full epidemiological intervention the indirect effect through the changing demographic structure will be more important than the direct health care cost saving effect i also explore different taxation policies the households would be willing to sacrifice an amount equal to 12 of gdp in the first period to be subject to an optimal ramsey fiscal policy rather than an alternative fixed debt to gdp policy the optimal policy implies an increase in government debt during the peak of the epidemic

design for the environment a quality based model for green product development green product development which addresses environmental issues through product design and innovation as opposed to the traditional end of pipe control approach is receiving significant attention from customers industries and governments around the world in this paper we develop a quality based model for analyzing the strategic and policy issues concerning the development of products with conflicting traditional and environmental attributes on the demand side of the problem we use the framework of conjoint analysis to structure the preferences of the ordinary and green customers on the supply side we apply the theories in optimal product design and market segmentation to analyze the producer s strategic decisions regarding the number of products introduced and their prices and qualities on the policy side we evaluate the effects of environmental standards on the economic and environmental consequences of green product development by jointly considering the interactions among the customers preferences the producer s product strategies and the environmental standards imposed by governments we present some interesting findings that can be used to manage and regulate the development of green products two major findings show that green product development and stricter environmental standards might not necessarily benefit the environment

a cross functional approach to evaluating multiple line extensions for assembled products assembled product manufacturers often introduce line extensions that share components with existing products or among themselves resulting in cost interactions among products because of shared costs and revenue interactions because of cannibalization we present a cross functional approach to evaluating multiple line extensions that simultaneously considers revenue implications of component sharing at the product level and cost implications at the component level we develop a source of volume model and a measurement procedure to decompose the life cycle sales volume from a line extension into sales from cannibalization competitive draw and demand expansion we develop an activity based costing procedure for estimating the life cycle costs of line extensions that share components we develop an optimization model that uses these revenue and cost estimates to identify a subset of line extensions that maximizes incremental profits we implement our approach at a quartz wristwatch manufacturer results suggest that our approach would have improved profits for the firm by over 5 while actually launching fewer line extensions we also find that the drivers of cannibalization are counterintuitive in simulation studies our approach outperforms three managerial heuristics we demonstrate that this approach is most valuable when cannibalization dominates competitive draw as a source of volume and discuss its relative merits under low and high parts sharing

minimum quality standards with more than two firms abstract this paper studies the effects of introducing a minimum quality standard mqs in a vertically differentiated market it is shown that previous results indicating beneficial effects of a mqs heavily depend on the duopolistic set up they had been developed in an example with three firms is then provided showing that not all reaction functions in quality levels are increasing we also show that the introduction of the standard decreases the profit levels of all firms the maximum quality level and the average quality consumed as a consequence despite the increase in consumer surplus any effective mqs would reduce welfare

operations research for green logistics an overview of aspects issues contributions and challenges the worldwide economic growth of the last century has given rise to a vast consumption of goods while globalization has led to large streams of goods all over the world the production transportation storage and consumption of all these goods however have created large environmental problems today global warming created by large scale emissions of greenhouse gasses is a top environmental concern governments action groups and companies are asking for measures to counter this threat operations research has a long tradition in improving operations and especially in reducing costs in this paper we present a review that highlights the contribution of operations research to green logistics which involves the integration of environmental aspects in logistics we give a sketch of the present and possible developments focussing on design planning and control in a supply chain for transportation inventory of products and facility decisions while doing this we also indicate several areas where environmental aspects could be included in or models for logistics

the short run demand for money a reconsideration the partial adjustment approach to the specification of the short run demand for money has dominated the literature for more than a decade there are three basic problems with this approach first the same lag structure is imposed on all variables and each independent variable enters only as a current value in contrast a rational individual would respond to different variables income interest rates prices with quite different lags second when the general price levelis subject to gradual adjustment hut can move quickly in response to supply shocks the influence of these supply shocks should enter with a negative sign third the estimated equation for real balances may not be a money demand equation at all but rather its coefficients may represent a shifting mixture of demand and supply responses the empirical work examines several alternative dynamic specifications including a generalized partial adjustment framework and the error correction model both of the latter specifications exhibit greater structural stability after 1973 than the standard partial adjustment specification and the generalized partial adjustment model also yields relatively small errors in post sample dynamic simulations shifts in coefficients as the sample period is extended after 1973 are consistent with the interpretation that the real balance equation no longer traces out structural demand parameters hut rather a mixture of demand and supply responses this abstract was borrowed from another version of this item

pricing market coverage and capacity can green and brown products co exist abstract environmental strains are causing consumers to trade up to greener alternatives and many brown products are losing market coverage to premium priced green rivals in order to tackle this threat many companies currently offering only brown products are contemplating the launch of a green product to complement their product portfolio this paper provides strategic insights into and tactical ramifications of expanding a brown product line with a new green product our analysis explicitly incorporates a segmented consumer market where individual consumers may value the same product differently the economies of scale and the learning effects associated with new green products and capacity constraints for the current production system it is shown that a single pricing scheme for the new green product limits a firm s ability to appropriate the value different customers will relinquish in a segmented market and or to avoid cannibalization a two level pricing structure can diminish and even completely avoid the salience of cannibalization however when resources are scarce a firm can never protect his products from the threat of cannibalization by just revising the pricing structure which can spell the end of his brown product s presence in the market or preclude the firm from launching the green product at this point the degree of cannibalization is higher for the brown product when the green product offers a sufficiently differentiated proposition to green segment consumers

optimizing an emission trading scheme for local governments a stackelberg game model and hybrid algorithm this study investigates a policy making problem for a local government to implement an emission trading scheme by considering the interactive production decisions of firms in its administrative region the market based allowance trading price formed freely among the firms in the region is investigated by taking into account regional environmental bearing capacities under the scheme the government sets the emission reduction target of the region and allocates tradable initial allowances to firms and firms plan their production according to their allowances on hand a stackelberg game model is formulated to analyze the decisions of the government and firms aiming to maximize the social welfare of the region and maximize the profit of each firm in view of the non concavity and discreteness of the decision model for the government we propose a hybrid algorithm to solve the game model efficiently this algorithm consists of a polynomial time dynamic programming binary search and genetic algorithm results reveal that i the stackelberg game model greatly supports local governments policy making on the market driven emission allowance trading scheme and that ii the social welfare is a great metric for policy making decisions on environmental regulations the market driven emission trading scheme is an effective mechanism for local governments to induce emission reduction through green technology adoption by firms however governments should set their emission reduction targets appropriately because a tight or easy regulation policy significantly affects the environmental and economic benefits as well as the social welfare

an oligopoly model to analyze the market and social welfare for green manufacturing industry abstract as public concerns on sustainable economic development increase an increasing number of manufactured products have found their environmentally preferable alternatives in this study we propose an oligopoly game theoretical model to analyze the competition between the green and ordinary manufacturing sectors we identify cost efficiency and innovative design as key elements to the survival of green products we also find that the effectiveness of pigouvian tax and subsidy policies depend on product characteristics market structures as well as targeted results our small empirical examples on corolla vs prius and incandescent lamp vs compact fluorescent lamp cfl show that our modeling results are more optimistic than real market statistics we identify pre equilibrium market dynamics consumer bias towards green products and modeling limitations as the main reasons for such differences we also investigate the market competition and total societal welfare in the presence of tax and subsidy policy intervention the study results not only provide guidelines and managerial insights for green producers to understand the underlying factors that determine the competitiveness of green products in the market but also benefit policy makers by quantitatively showing the effectiveness of tax and subsidy policies in promoting green products

toward a theoretical model of voluntary overcompliance abstract we explain why some firms voluntarily overcomply with environmental regulation in our model all consumers value environmental quality but differ in their willingness to pay which depends on their income levels publicly available information on environmental performance of firms enables consumers to identify clean firms firms participate in a two stage duopoly game where they first choose their levels of cleaning technology and next engage in price competition the market gets segmented by income levels a minimum standard binding on the dirty firm has the effect of improving the performance of the cleaner firm a subsidy obtains the same competitive outcome

should america save for its old age fiscal policy population aging and national saving he federal government has recently seen an abrupt turnaround in its budget balance from years of deficits to the now predicted years of surpluses this switch has been widely hailed since many analysts believe that the united states saves too little and that the switch to government budget surpluses can help to address that problem indeed concern about low u s saving and the long term budget outlook has increased of late as the retirement of the baby boom generation draws closer and the financial pressures associated with population aging loom larger in this paper we cite a collection of arguments for why u s fiscal policy should be used to increase national saving then we focus on whether the aging of the u s population adds force to these arguments for boosting national saving and conclude perhaps surprisingly that it may not the potential role of fiscal policy in preparing the country for the coming demographic change is at the center of recent budget proposals although the sudden emergence of budget surpluses is to a large extent based on economic and other factors beyond the government s direct control one can argue that the political will to maintain these surpluses stems in part from a desire to prepare for the retirement of the baby boomers moreover the question of whether the projected surpluses should be devoted to new spending tax cuts or debt reduction is entangled with arguments over what portion of the surpluses should go to saving social security and medicare yet the appropriate saving response to population aging is not clear cut while aging boosts the demands on future resources it also changes the rate of return the u s economy can expect from saving the net effect of aging on desired saving is

optimal tax policy under environmental quality competition this paper studies the socially optimal emission and commodity tax policy when consumers are willing to pay a price premium for environmentally friendlier variants of a commodity vertically differentiated in environmental quality the first best levels of quality can be obtained by a combination of a uniform ad valorem tax and an emission tax or a subsidy for buying green products the first best emission tax is higher than the social valuation of the positive externality associated with average environmental quality regardless of environmentally conscious consumers if only one instrument is available the second best emission tax is equal to the social valuation of the positive externality associated with average environmental quality a uniform ad valorem tax increases welfare only if the social valuation of the positive externality associated with average environmental quality is low enough

the impact of the demographic transition on capital formation the population of the united states is aging we review a variety of the implications this has for u s national saving rates and discuss the policy issues that they raise after reviewing what different models would predict for household saving over the next several decades we consider how the demographic transition may also affect national saving through changes in government behavior ways in which the composition of household saving might change as individuals age are also analyzed along with the implications of changes in government fiscal policy for asset composition excerpt

green hypocrisy environmental attitudes and residential space heating expenditure popular media make claims of a green hypocrisy groups which have the strongest attitude towards the environment also have the highest emissions this study examines whether environmental behaviours beliefs and attitudes are associated with space heating energy use in the uk in order to test for evidence of a green hypocrisy in the uk the largest proportion of household energy use is for space heating we find that environmental behaviours are negatively correlated with heating expenditures while environmentally friendly attitudes and perceptions are not associated with lower heating expenditure further the effect of these attitudes and behaviours does not change as income increase there seems to be little evidence of a green hypocrisy amongst the uk public with respect to space heating

a decade of tax and benefit reforms in sweden effects on labour supply welfare and inequality sweden has experienced a sequence of tax and benefit reforms during the last decade in this paper we evaluate these reforms from labour supply welfare and inequality points of view we depart from a household labour supply model simulation of the model reveals that tax and benefit reforms have led to a considerable reduction of the excess burden regarding social welfare and inequality we show that the results depend to a large extent on the income inequality measure and the measure of social welfare as well as the income concept household disposable income or money metric utility

customer regulatory and competitive pressure as drivers of environmental innovation we develop an economic analysis in order to examine the effects of consumer regulatory and competitive pressure on firm investments in environmentally friendly production specifically we ask why do firms vary in their levels of environmental innovation under what conditions are such pressures effective in bringing about environmental innovation we first consider a monopolist who faces the twin pressures of reduced customer demand and regulatory penalties as a result of its emissions in response to these pressures the firm has the opportunity to make a costly investment in reduction of emissions secondly we consider a competitive scenario in which two firms compete for environmentally sensitive customers solving our model we find that pressure has the intended effect as long as the firm s initial level of emissions is below a certain threshold if the emissions are above this threshold we find that pressure might have an adverse effect on the firm s environmental investment and that subsidies that support environmental innovation can be a better alternative we also show that competition over environmentally sensitive customers can improve the effectiveness of environmental pressures

mainstreaming green product innovation why and how companies integrate environmental sustainability green product innovation has been recognized as one of the key factors to achieve growth environmental sustainability and a better quality of life understanding green product innovation as a result of interaction between innovation and sustainability has become a strategic priority for theory and practice this article investigates green product innovation by means of a multiple case study analysis of 12 small to medium size manufacturing companies based in italy and canada first we propose a conceptual framework that presents three key environmental dimensions of green product innovation such as energy minimization materials reduction and pollution prevention as identified in the life cycle phases of products based on insights gained from in depth interviews we discuss firms motivations to develop green products environmental policies and targets for products different dimensions of green product innovation and challenges faced during developing and marketing of green products results from the study are then synthesized and integrated in a toolbox that sheds light on various aspects of green product innovation and provides solutions to challenges and risks that are faced by firms finally implications for managers academia and public policy makers are discussed

success factors for environmentally sustainable product innovation a systematic literature review the growing awareness regarding environmental sustainability has fully reached business reality consumers and companies alike are looking for alternatives to mitigate pressing environmental demands resulting from continuous population and economic growth on the other hand companies must deal with an increasingly competitive scenario where innovation is regarded as a survival need in most markets it is thus clear that systematic academic research is paramount to guide companies to succeed in environmentally sustainable product innovation in this context this paper i consolidate extant research and aggregate findings of different studies on environmentally sustainable product innovation through an interpretative framework of published literature on the topic and ii map critical success factors that drive the success of product innovation developed in this new logic of production and consumption to achieve these objectives a systematic literature review on environmentally sustainable product innovation was conducted results show that there are four main critical success factors for environmentally sustainable product innovation market law and regulation knowledge interfunctional collaboration innovation oriented learning and r d investments the factors identified in this research and corresponding variables were subjected to a brief empirical test by professionals the test allowed a preliminary approval of the developed framework and identification of the most important variables within each factor a research agenda based on the state of the art on the topic is also proposed

quality leadership when regulatory standards are forthcoming in many markets governments set minimum quality standards while some sellers compete on the basis of quality by exceeding them such quality leadership strategies often win public acclaim especially when they involve environmental attributes using a duopoly model of vertical product differentiation we show that if the high quality firm can commit to a quality level before regulations are promulgated it induces the regulator to weaken standards and welfare falls our results raise doubts about the social benefits of corporate self regulation and highlight the dangers of lengthy delays between legislative mandates for new regulations and their implementation

the cyclical and secular behaviour of the labour input comparing efficiency units and hours worked summary a monthly labour input series designed to correct for the fact that all hours worked are not of the same quality is constructed and its properties compared with unadjusted hours worked this efficiency units series is constructed from bls data on hours worked and earnings by age and sex the cyclical fluctuations displayed by the efficiency units series are smaller on average than those displayed by hours worked although the difference is not large however the secular behaviour of the series is quite different hours worked per capita displays a significant positive trend while efficiency units per capita does not

governance mechanisms of dual channel reverse supply chains with informal collection channel abstract the existence of informal collection channel has been a serious problem for reverse supply chain management in china informal collectors interrupt the normal order of end of life product collection to assess this problem this article explores governance mechanisms of the current recycling system in practical operations from the perspectives of both governments and enterprises based on the respective characteristics of two collection channels i e formal and informal we establish a stackelberg game model to describe and analyze the dual channel collection supply chain in which consumer preference to collection channels is considered based on the benchmark model three governance mechanisms set by both governments and formal collectors are introduced and analyzed when deriving optimal decisions and certain parameter properties this study demonstrates that both governments and collectors can implement appropriate governance mechanisms to control or utilize the informal collection channel under different circumstances on one hand on the other hand governance mechanisms set by the government are unenforceable to control informal collection under certain situations the effectiveness of governance mechanisms is determined based on different channel preferences of consumers and the economic value of the waste electrical and electronic equipment weee

the dynamic effects of aggregate demand and supply disturbances we interpret fluctuations in gnp and unemployment as due to two types of disturbances disturbances that have a permanent effect on output and disturbances that do not we interpret the first as supply disturbances the second as demand disturbances demand disturbances have a hump shaped mirror image effect on output and unemployment the effect of supply disturbances on output increases steadily over time peaking after two years and reaching a plateau after five years

customer satisfaction productivity and profitability differences between goods and services there is widespread belief that firms should pursue superiority in both customer satisfaction and productivity however there is reason to believe these two goals are not always compatible if a firm improves productivity by downsizing it may achieve an increase in productivity in the short term but future profitability may be threatened if customer satisfaction is highly dependent on the efforts of personnel if so there are potential tradeoffs between customer satisfaction and productivity for industries as diverse as airlines banking education hotels and restaurants managers in these types of service industries as well as goods industries in which the service component is increasing need to understand whether or not this is the case for example if efforts to improve productivity can actually harm customer satisfaction and vice versa the downsizing of u s and european companies should be viewed with concern it follows that developing a better understanding of how customer satisfaction and productivity relate to one another is of substantial and growing importance especially in light of expected continued growth in services throughout the world economy the objective of this paper is to investigate whether there are conditions under which there are tradeoffs between customer satisfaction and productivity a review of the literature reveals two conflicting viewpoints one school of thought argues that customer satisfaction and productivity are compatible as improvements in customer satisfaction can decrease the time andeffort devoted to handling returns rework warranties and complaint management while at the same time lowering the cost of making future transactions the second argues that increasing customer satisfaction should increase costs as doing so often requires efforts to improve product attributes or overall product design a conceptual framework useful in resolving these contradictory viewpoints is developed the framework serves in turn as a basis for developing a theoretical model relating customer satisfaction and productivity the model predicts that customer satisfaction and productivity are less likely to be compatible when 1 customer satisfaction is relatively more dependent on customization the degree to which the firm s offering is customized to meet heterogeneous customers needs as opposed to standardization the degree to which the firm s offering is reliable standardized and free from deficiencies and 2 when it is difficult costly to provide high levels of both customization and standardization simultaneously to move forward from the model s propositions to the development of testable hypotheses we argue that services are more likely than goods to have the preceding characteristics hence tradeoffs between customer satisfaction and productivity should be more prevalent for services than for goods although this classification is not precise many services are standardizable and many goods have a service component it has the advantage of allowing an initial test of the propositions the empirical work employs a database matching customer based measures of firm performance with traditional measures of business performance such as productivity and return on investment roi the central feature of this database is the set of customer satisfaction indices provided by the swedish customer satisfaction barometer scsb the scsb provides a uniform set of comparable customer based firm performance measures and offers a unique opportunity to test the study s hypotheses the findings indicate that the association between changes in customer satisfaction and changes in productivity is positive for goods but negative for services in addition while both customer satisfaction and productivity are positively associated with roi for goods and services the interaction between the two is positive for goods but significantly less so for services taken together the findings suggest support for the contention that tradeoffs are more likely for services hence simultaneous attempts to increase both customer satisfaction and productivity are likely to be more challenging in such industries of course this does not imply that such firms should not seek improvements in both productivity and customer satisfaction for example appropriate applications of information technology may improve both customer satisfaction and productivity simultaneously the findings should provide motivation for future research concerning the nature of customer satisfaction and productivity as well as appropriate strategy and tactics for each one it is worth emphasizing that this is an issue that is not only important today but certainly will become even more important in the future as the growth of services continues and world markets become increasingly competitive the importance of customer satisfaction will also increase to compete in such a world firms must strike the right balance between their efforts to compete efficiently and their efforts to compete effectively

environmental policy in a green market this paper studies the impact of some frequently used environmental policies in a duopolistic market where purchasers are willing to pay more for less polluting goods when consumers differ in their environmental awareness a cleaner and a dirtier variant coexist in equilibrium the higher the average willingness to pay for the good the lower are variants unit emissions but the higher are industrial aggregate effluents a maximum unit emission standard reduces unit emissions of both variants but boosts firms sales and consequently increases industrial aggregate emissions as a result social welfare may be reduced we also explore the effects of technological subsidies and product charges including differentiation of charges

the implications of costs capacity and competition on product line selection we consider a situation in which a manufacturer has to select the product s to sell as well as the selling price and production quantity of each selected product there are two substitutable products in the consideration set where product 2 has a higher quality and reservation price than that of product 1 by considering the cannibalization effect that depends on the selling price of each product the manufacturer needs to evaluate the profit function associated with three different product line options sell both products or only one of the 2 products in order to examine the impact of costs capacity and competition on the optimal product line selection optimal price and optimal production quantity analytically we present a stylized model in this paper so that we can determine the conditions under which a particular option is optimal

towards sustainable consumption and production competitive pricing of modular products for green consumers abstract concern for unsustainable development has peaked and promoting and devising sustainable production and consumption is vital therefore via an analytical model we examine the impact of modularity and consumer sensitivity to sustainability on the pricing decisions of two competing firms consider an environmentally conscious green consumer who will buy one of two available horizontally differentiated products a modular product m manufactured by firm m or a standard product s manufactured by firm s firm m can take advantage of its modular production technology and product return policy for such a consumer driven demand setting we develop a model and solve to optimality a single stage non cooperative game where both firms simultaneously set their competitive prices in addition to analytical expressions for the optimal prices and the profits for both firms we provide structural results and numerical examples to render practical insights the refund rate has a strong impact on profits sensitivity of product greenness can be increased by conscientious advertising and the reusability of modular parts encourages lower pricing and higher market share we assert that modularity is a strong concept and practice in developing sustainable products and thereby in production which in turn may enhance sustainable consumption this study s findings have direct implications for reverse supply chain management and firms should take these findings into account early in the product design phase

toward a new conception of the environment competitiveness relationship accepting a fixed trade off between environmental regulation and competitiveness unnecessarily raises costs and slows down environmental progress studies finding high environmental compliance costs have traditionally focused on static cost impacts ignoring any offsetting productivity benefits from innovation they typically overestimated compliance costs neglected innovation offsets and disregarded the affected industry s initial competitiveness rather than simply adding to cost properly crafted environmental standards can trigger innovation offsets allowing companies to improve their resource productivity shifting the debate from pollution control to pollution prevention was a step forward it is now necessary to make the next step and focus on resource productivity

public saving and policy coordination in aging economies in the coming decades the share of people of working age will fall significantly in most developed countries according to optimal taxation theory public debts should be reduced before the baby boom generation retires i find that if debts are instead maintained at current levels welfare may be reduced substantially in countries with a large public sector and or a large demographic change since population aging will be less dramatic in the united states than in europe and japan capital will move from europe and japan to the united states these capital movements will facilitate the us demographic transition but aggravate the transition in most european countries

green insurance subsidy for promoting clean production innovation abstract green insurance is introduced to advance green development in recent years and this article addresses the effects of insurance subsidy with game theory model some useful results are achieved first uncertainty deters firms innovation while both mature technology and high production efficiency stimulate firms innovation second interestingly green insurance cannot improve innovation and expect profits of firms but green insurance reduces risk finally both green insurance subsidy and governmental subsidy promotes firms innovation but green insurance subsidy owns lower risk than direct subsidy to innovate

the role of co opetition in low carbon manufacturing abstract low carbon manufacturing has become a strategic objective for many developed and developing economies this study examines the role of co opetition in achieving this objective we investigate the pricing and emissions reduction policies for two rival manufacturers with different emission reduction efficiencies under the cap and trade policy we assume that the product demand is price and emission sensitive based on non cooperative and cooperative games the optimal solutions for the two manufacturers are derived in the purely competitive and co opetitive market environments respectively through the discussion and numerical analysis we uncovered that in both pure competition and co opetition models the two manufacturers optimal prices depend on the unit price of carbon emission trading in addition higher emission reduction efficiency leads to lower optimal unit carbon emissions and higher profit in both the pure competition and co petition models interestingly compared to pure competition co opetition will lead to more profit and less total carbon emissions however the improvement in economic and environmental performance is based on higher product prices and unit carbon emissions

optimal production planning with emissions trading emissions trading is a market based mechanism for curbing emissions and it has been implemented in europe north america and several other parts of the world to study its impact on production planning we develop a dynamic production model where a manufacturer produces a single product to satisfy random market demands the manufacturer has access to both a green and a regular production technology of which the former is more costly but yields fewer emissions to comply with the emissions regulations the manufacturer can buy or sell the allowances in each period via forward contracts in an outside market with stochastic trading prices while needing to keep a nonnegative allowance account balance at the end of the planning horizon we first derive several important structural properties of the model and based upon them we characterize the optimal emissions trading and production policies that minimize the manufacturer s expected total discounted cost in particular the optimal emissions trading pol

effective tax rates in macroeconomics cross country estimates of tax rates on factor incomes and consumption abstract this paper proposes a method for computing tax rates using national accounts and revenue statistics using this method we construct time series of tax rates for large industrial countries the method identifies the revenue raised by different taxes at the general government level and defines aggregate measures of the corresponding tax bases this method yields estimates of effective tax rates on factor incomes and consumption consistent with the tax distortions faced by a representative agent in a general equilibrium framework these tax rates compare favorably with existing estimates of marginal tax rates and highlight important international differences in tax policy

on the consequences of demographic change for rates of returns to capital and the distribution of wealth and welfare in the industrialized world the population is aging over time reducing the fraction of the population in working age consequently labor is expected to be scarce relative to capital with an ensuing decline in the real return on capital this paper uses demographic projections together with a large scale multi country overlapping generations model with uninsurable idiosyncratic uncertainty to quantify the distributional and welfare consequences of these changes in factor prices induced by the demographic transition in our model capital can freely flow between different regions in the oecd the u s the eu and the rest of the oecd thus international capital flows may in principle mitigate the decline in rates of returns one would expect in the u s if it were a closed economy we find exactly the opposite in the u s as an open economy rates of return are predicted to decline by 86 basis points between 2005 and 2080 if the u s were a closed economy this decline would amount to only 78 basis points this result is due to the fact that other regions in the oecd will age even more rapidly therefore the u s is importing the more severe aging problem from these regions especially europe a similar conclusion is reached if we let capital flow freely between the oecd and the rest of the world row while row currently has a younger population structure it is predicted to age even more severely in the next decades giving rise to an even more pronounced decline in world rates of return to capital in order to evaluate the welfare consequences of the demographic transition we ask the following hypothetical question suppose a household economically born in 2005 would live through the economic transition with changing factor prices induced by the demographic change but keeping her own survival probabilities constant at their 2005 values how would its welfare have changed relative to a situation without a demographic transition we find that households experience significant welfare losses due to the demographic transition in the order of 2 5 of consumption depending on their initial productivity level and the design of the pension system these losses are mainly due to the fact that lower future returns to capital make it harder for households to save for retirement on the other hand if the oecd suddenly opens up to row in 2005 and row has higher returns to capital before the world capital market integration then these losses are reduced to 1 5 2 5

demography national savings and international capital flows this paper addresses the relationship between age distribution national savings and the current account balance the results point to substantial demographic effects with increases in both the youth and old age dependency ratios associated with lower savings rates they also point to differential effects on savings and investment and thus to a role for demography in determining the current account balance the estimated demographic effect on the current account balance exceeds 6 percent of gdp over the last three decades for a number of countries and given expected demographic trends is likely to be substantially larger over the coming decades copyright 1998 by economics department of the university of pennsylvania and the osaka university institute of social and economic research association

minimum quality standards and collusion we model the introduction of a minimum quality standard in a vertically differentiated duopoly we extend the literature in determining the standard endogenously showing that the maximisation of social welfare entails an increase in the surplus accruing to consumers served by the low quality firm and a decrease in the surplus of the remaining consumers then we consider the effects of the standard on the stability of price collusion proving that the standard makes it more difficult for firms to collude if consumers are sufficiently rich

nonconvex costs and the behavior of inventories this paper explores one possible explanation for the apparent excess volatility of production relative to sales nonconvexities in the technology facing firms it is shown that if firms operate in a region of declining marginal costs then small shifts in demand can cause production to jump substantially estimates for six production to stock industries as well as the automobile industry suggest that all these industries behave as if they were operating in the region of nonconvex costs the results have important implications not only for inventory investment but also for the cyclical behavior of productivity and prices

market segmentation self selection and product line design the purpose of this paper is to develop a theory of market segmentation based on consumer self selection the extant theory is based on the third degree price discrimination model of pigou central assumptions of which are that the firm can directly address individual segments and isolate them by using consumer self selection i am relaxing these assumptions in the context of a monopolist designing a product line i show that this relaxation has significant implications for how the products and prices are chosen and what they look like in particular segments may be aggregated even though there are no economies of scale furthermore consumer self selection enables us to model cannibalization and competition among firms

broader product line a necessity to achieve success strategic product line breadth decisions evoke differential responses from the manufacturing and the marketing areas manufacturing prefers keeping process disruptions to a minimum and as a result discourages product proliferation however marketing in its attempt to match products to heterogeneous consumer needs and gain market share emphasizes a broader product line we systematically investigate the market benefits and cost disadvantages of broader product lines on a large sample of over 1 400 business units our results indicate significant market share benefits and increases in firms profitability with broader product lines moreover widely held beliefs of increases in production costs are not empirically supported american manufacturing firms may indeed be flexible enough to accommodate product variety without significant detrimental effects on costs

domestic merger policy in an international oligopoly the nordic market for electricity many domestic markets are becoming integrated in international markets is this an argument for permitting mergers between domestic producers it is shown that a merger with no cost saving effects will always be detrimental to domestic welfare if the country is an importer of the good in question and may increase welfare if the country is an exporter and the price cost margin is sufficiently low initially we specify a general condition for a merger to improve welfare and apply the condition on the nordic market for electricity numerical calculations suggest that in this particular market the norwegian competition authority should ban domestic mergers with no cost savings

the problem of identification of the money demand function cooley and leroy 1981 have argued that if random shifts in money demand are at least partially accommodated by the federal reserve then there is no obvious way to identify the money demand function for the purposes of estimation we argue that this is not correct and that identification is in fact straightforward provided that the monetary authority reacts to at least one variable not in the money demand function if the monetary authority looks at everything in making its policy this condition is likely to be fulfilled

price discrimination with a resource constraint abstract introducing an aggregate resource constraint into mussa and rosen s mussa m rosen s 1978 monopoly and product quality journal of economic theory 18 2 301 317 model of monopoly price discrimination induces an upwards distortion in product quality for high valuation consumers because the standard downward distortions in product quality for other consumers relax the resource constraint

sustaining fiscal policy through immigration this paper explores the fiscal implications of immigration to the us and argues that immigration policy should be viewed as a vital part of fiscal policy in particular a case is made that skill

effects of the preference for environmental quality on the export competition between china and oecd countries this study examines how importers preferences for environmentally friendly products influence the effect of china s export growth on the exports of oecd countries to third markets the effect of china s export growth is systematically investigated using the theoretical gravity model which assumes that importers environmental preferences are heterogeneous among countries a new measure is also proposed to represent importers revealed preferences for environmental quality across countries panel data consisting of observations for 30 oecd exporting countries and 60 importing countries over the 2000 10 period confirm that the crowding out effect of china s export growth on the exports of oecd countries observed in markets for consumption goods and the dampening effect observed in markets for intermediate goods are becoming weaker as the importer preference for environmental quality becomes stronger

including sustainability criteria into inventory models research on sustainability performance has considerably enriched operations management literature in recent years however work with quantitative models is still scarce this paper contributes by revisiting classical inventory methods taking sustainability concerns into account we believe that reducing all aspects of sustainable development to a single objective is not desirable we thus reformulate the classical economic order quantity model as a multiobjective problem we refer to this model as the sustainable order quantity model then a multi echelon extension of the sustainable order quantity model is studied for both models the set of efficient solutions pareto optimal solutions is analytically characterized these results are used to provide some insights about the effectiveness of different regulatory policies to control carbon emissions we also use an interactive procedure that allows the decision maker to quickly identify the best option among these solutions the proposed interactive procedure is a new combination of multi criteria decision analysis techniques

performance evaluation and a flow allocation decision model for a sustainable supply chain of an apparel industry abstract there is a growing concern that business enterprises and their supply chains focus primarily on economic activities and ignore their impact on the environment and society this paper aims to help decision makers managers and practitioners to achieve economic growth societal development and environmental protection by developing sustainable supply chain performance measures and proposes a partner selection and flow allocation decision making model survey data from 278 business organizations from the indian apparel industry supply chain network were used and an integrated method of structural equation modeling fuzzy analytical hierarchy process and fuzzy multi objective linear programming was applied to the proposed model the results of the structural equation modeling analysis indicate that the survey respondents considered sustainable production performance to be of prime importance which thus indicates its significance in developing a sustainable supply chain for the apparel industry to illustrate the use of the proposed model for partner selection and flow allocation decision making real time data from an apparel manufacturer are presented optimal results were obtained for two strategies sustainability and cost saving to show a cost benefit trade off when developing a sustainable supply chain using comparative performance a decision maker can choose an appropriate strategy based on cost benefit analysis of the presented trade offs

effects of carbon reduction labels evidence from scanner data we investigate the effects of carbon reduction labels using a detailed scanner data set using a difference in differences estimation strategy we find that having a carbon label has no impact on detergent prices or demand we also investigate possible heterogeneous effects of carbon labels using the synthetic control method we find no evidence to indicate that the prices for the counterfactual detergents without the label would have been any different from the prices of the carbon labeled detergents we investigate the reasons for these results and conclude that the specific design of the carbon label is responsible for its lack of success jel d12 d83 l15 q54

the economics of product variety a survey demand for variety may arise from a taste for diversity in individual consumption and or from diversity in tastes even when each consumer chooses a single variant the full degree of variety potentially demanded will not in general be supplied because scale economies even to a small degree mean that the potential welfare or revenue gain from greater variety must be balanced against the lower unit production costs with fewer variants the economics of product variety consists essentially in analysing the effect of this balance in different situations and comparing the degree of product variety for different market structures with each other and with the optimum the survey commences with the work on market structures with single product firms generalized monopolistic competition tracing modern developments in both the chamberlinian and hotelling traditions the latter has been particularly fruitful due to the expansion of the original locational ideas into virtual spaces in product characteristics the emphasis in recent work on product variety has been on multiproduct firms in both monopolistic and oligopolistic structures including strategic market preemption although most work has been in a full information context there have been advances in product variety under imperfect information either by consumers to properties of the firms products or firms as to consumers demands

environmental safety stock the impacts of regulatory and voluntary control policies on production planning inventory control and environmental performance abstract this paper analyzes the impacts of different pollution control policies on a firm s decisions of production planning and inventory control based on a stochastic model with both demand and environmental uncertainties we derive the optimal policies of production planning and inventory control under both regulatory and voluntary pollution control approaches and investigate their operational and environmental effects we establish that the conventional wisdom which suggests that reduction of environmental waste at the end of a production process also decreases the stock and throughput levels of a production system is not necessarily true rather a regulatory environmental standard that limits the total amount of waste may induce the firm to raise its planned stock level which would lead to a higher expected amount of environmental wastes before the standard is enforced as well as environmental risks at other stages of the production process the additional planned stock level which is termed environmental safety stock can be reversed by using the voluntary control approach that provides the firm with the flexibility to occasionally exceed the environmental standard we also conduct numerical experiments to analyze the effects of different values of model parameters under different control approaches the analytical results provide new insights to the impacts of a firm s production and inventory decisions on the natural environment as well as to the choices of pollution control approaches by decision makers in both the private and public sectors

intertemporal substitution in labor supply evidence from micro data the sensitivity of the supply of labor to intertemporal variation in the wage is an important issue in macroeconomics the analysis of social security and pensions and the study of life cycle patterns of work this paper explores two approaches to the measurement of intertemporal substitution that have appeared in the literature the first approach is to use consumption to control for wealth and unobserved expectations about future wages in the labor supply equation the second approach is to estimate a first difference equation for hours in which labor supply from the previous period serves as a control for wealth and wage expectations the results indicate that intertemporal substitution elasticity for married men is positive but small

product innovation in response to environmental standards and competitive advantage a hedonic analysis of refrigerators in the japanese retail market abstract the purpose of this study is to determine whether environmentally friendly attributes that are innovated in response to environmental standards contribute to creating a competitive advantage because manufacturers of products with only commoditized value cannot achieve a competitive advantage they need to add differentiated value including environmentally friendly attributes through product innovation in this situation environmental standards have a potential to encourage them to undertake product innovation thus this study analyzes not only whether a product with environmentally friendly attributes that reflect environmental standards receives a price premium but also whether product commoditization that is associated with drastic price declines has occurred for the product the methodology for these analyses is a hedonic price regression using data for refrigerators sold in the japanese retail market during 1998 2012 the main findings are as follows first the fundamental value of refrigerating has been drastically commoditized in the last 15 years second products that are chlorofluorocarbon free and energy consumption efficient reflecting environmental standards have a price premium third the price premium for each attribute has specific trends during the period these findings support the view that a product s environmentally friendly attributes that reflect environmental standards more or less compensate for the commoditized value through the price premium therefore product innovation in response to environmental standards helps create a competitive advantage especially where product commoditization has occurred

design for the environment impact of regulatory policies on product development abstract globally automakers are facing pressure from their stakeholders to follow sustainable business practices and produce products that are less harmful to the environment the introduction of gas guzzling automobiles in the us market despite the increasingly stringent emission norms highlights the widening gap between the goals of the regulators and the automakers demanding a fresh outlook at the regulatory framework in this paper we therefore propose a composite regulatory standard that not only allows the regulators to control various environmental standards but also provides automakers with an opportunity to exploit scale economies and synergies in product development our results show that under composite regulations sufficiently high economies of scale will ensure higher traditional and environmental qualities as well as higher profits for the automaker while operating in two markets as opposed to a single market we also find under the composite regulations that when more demanding norms are in place despite positive synergies between traditional and environmental quality attributes higher environmental quality is not guaranteed unless the scale economies are sufficiently high our work has implications for regulatory authorities in evaluating alternative policy design under heterogeneous market characteristics and technological synergies

competitive advantage of qualified weee recyclers through epr legislation abstract most of waste appliances in china are handled by unqualified recyclers rather than by qualified ones equipped with advanced but costly technology to address this problem china implements a series of take back legislations in the framework of extended producer responsibility epr with a self financing subsidy scheme to analyze the performance of the legislations we develop a two period model with a selling period run by a manufacturer and a recycling period conducted by two recyclers we show that the self financing condition gives an upper limit for the subsidy we also show that this limit is not monotone in the recyclers competitiveness difference and there may be a gap between the upper limit and the optimal subsidy that maximizes the social welfare i e a larger subsidy does not necessarily render a larger welfare further we numerically show that the legislations improve the environment performance but decrease the total profits of the manufacturer and recyclers interestingly the legislations may or may not decrease the consumer surplus

cooperative strategies for sustainability in a decentralized supply chain with competing suppliers abstract in today s global market organizations increasingly recognize that they must address the issue of sustainability in their operations in addition the decision making processes surrounding sustainable supply chain management are raising a wide range of theories and claims about how best to address the issue in this study mathematical modeling is used to analyze managerial decision making in terms of improving sustainability in a decentralized supply chain with two competing suppliers firstly the concept of managerial decision making for competing suppliers is introduced next the mechanism used in the selection of cooperative strategies is described and the decisions related to demand energy efficiency and profits are analyzed in different scenarios of cooperative strategy combinations also lump sum transfer contracts are designed for supply chain coordination an experimental test of an automobile supply chain in china illustrates the impacts of competition intensity on profits the energy efficiency of environmentally friendly products and consumer surplus the analysis indicates that the sustainability of the supply chain can be efficiently enhanced through cooperative strategies and parameter adjustments while tradeoffs should be made by the policy maker before any cooperative strategy combination is advocated this study extends and complements existing literature with regard to how it is possible to improve sustainability in a competitive environment through cooperative supply chain strategies and parameter adjustments i e enhancing the price of environmentally friendly products lowering the supplier s share of instinct demand potential and lowering the manufacturer s fixed cost related to energy efficiency

a comparative analysis of greening policies across supply chain structures abstract in this paper we examine an apparel serial supply chain whose players initiate product greening we consider situations in which the players cooperate or act individually our problem is motivated by recent developments in the supply chains of global apparel players we build game theoretic models and show how greening levels prices and profits are influenced by channel structures we also study the impact of greening costs and consumer sensitivity towards green apparels we propose a two part tariff contract to coordinate the green channel our key contribution lies in the model of decision making of various supply chain structures and analyzing its impact on the players and supply chain the problem throws interesting insights into the strategies of apparel players and their key decisions

does anticipated monetary policy matter an econometric investigation a heated debate has arisen over the policy ineffectiveness proposition associate with the work of lucas sargent and wallace it postulates that anticipated aggregate demand policy will have no effect on business cycle fluctuations so that one deterministic feedback policy rule is as good as any other from the point of view of stabilizing the economy this paper develops a methodology for empirically analyzing rational expectations models displaying this neutrality result and then applies it to the important question of whether anticipated monetary policy matters to the business cycle

green product design in supply chains under competition abstract in this paper we investigate the green product design issues in supply chains under competition our research questions address how supply chains decisions on the greenness of products are affected by factors such as supply chain structures centralized and decentralized the green product types development intensive product or marginal cost intensive product and the types of competition price competition and greenness competition with a game theoretic approach our model starts with a simple supply chain with one manufacturer and one retailer then the model is expanded to include a horizontal retailer competition case and six cases of competing supply chains our results indicate that 1 the distortion from a non coordinated supply chain the double marginalization effect has counter intuitive impact on the degree of product greenness 2 supply chain price competition at the retailer level may positively influence the equilibrium greenness while the product greenness competition reduces the equilibrium greenness and the joint impact from price and greenness competition on equilibrium greenness depends on the relative strength of the two types of competition

pricing and quality decisions and financial incentives for sustainable product design with recycled material content under price leadership abstract design for recycling has been promoted by companies and governments around the world as one of the most important practices for achieving sustainability the success or failure of such a practice however depends heavily on the financial incentives for firms to design products with more recycled or recyclable material contents an interesting phenomenon that can be observed in many markets with products made predominately from either virgin or recycled materials is the existence of price leadership in this paper we utilize an interdisciplinary approach with both theoretical and empirical analyses to study the pricing and design decisions for products with virgin and recycled material contents in a duopoly market consisting of both the environmentally conscious green and non environmentally conscious brown consumers under price leadership our analytical results show that the brown segment s efficient quality provides an anchor product position for the price leader regardless of whether the price leader is a brown or green firm the price follower s financial incentive for becoming a green or brown firm will then lead to different cases of price leadership with very different environmental consequences specifically the arrangement where the brown and green firms are the price leader and follower respectively leads to more environmentally friendly design decisions than those under the other arrangement where the duopolists switch their pricing roles in addition we conduct an empirical analysis to explore the specific types of price leadership in the markets of aluminum cardboards and pet based on the equilibrium pricing and quality decisions we analyze the financial incentives for the more environmentally friendly case of price leadership to be realized and derive important insights to formulating strategies and policies to implement the practice of design for recycling from the interdisciplinary perspective

designing a family of development intensive products faced with fragmented markets saturated and demanding customers and global competition firms increasingly must design and offer a line of innovative quality differentiated products to target customers with differing willingness to pay wtp in this context designing a special class of products that we term development intensive products dips for which the fixed costs of development far outweigh the unit variable costspresents some unique managerial challenges examples of such development intensive offerings abound in a number of industries including the pharmaceutical information and entertainment sectors of the economy our contributions in this paper are threefold a to show that managerial insights from the traditional approach to product line design developed for unit variable cost intensive products do not carry over to dips b to present new mechanisms and managerial guidelines for designing a family of products for which development costs cannot be ignored and c to illustrate the insights with an extended industry example we find that the design approach based on degrading or subtracting value from a high end product to obtain a subsumed low end edition shown in the literature to be an effective approach for designing unit cost intensive products can be inappropriate for dips this limitation of value subtraction has implications for the number of variants and the sequence in which they are developed as an alternative to a subsumed product design strategy we propose and examine the overlapped product design approach in which a low end product is not completely subsumed within its high end counterpart but differentiated on additional vertical quality dimensions our results both explain the recent challenges of firms with subsumed low end products and guide them in designing a product line to successfully address emerging low end market segments

driving factors for the success of the green innovation market a relationship system proposal this study aims to map out the relationships that make up green innovation initiatives in brazilian industry the sample comprised 100 managers at manufacturing companies most of them operating in the business of farm machinery and equipment 45 managers and steel structures 14 managers to develop this study medeiros et al j clean prod 65 76 86 2014 study mapping critical factors that drive the success of green product innovation and the paradigm of complexity was used as a reference study based on the results it was possible to identify that the operational dynamic of the factors and variables that affect market success do not happen in an isolated or fragmented way they occur systematically with different contingencies and structured basic and intermediate skills in order to meet the expectations of consumers laws and environmental legislation initially the technological expertise factor was noted as very important for sustaining green product innovation furthermore since proactive leaders are an important factor for successfully developing environmentally sustainable products it must be added to technological expertise as the foundation for developing green innovation after defining the basis for green product innovation the intermediary conditions necessary for using the available technology appropriately were mapped out in this sense variables such as elimination of cultural barriers capacity for critical reflective analysis and experimentation are also very important in addition some of the variables of the cross functional collaboration and market knowledge factors were a part of the structure that organizations need to transform potential into developing green products which is the basis for the third level of the model the fourth level of the model has the meeting consumer expectations and following law and legislation factors which make up the main goals for developing environmentally sustainable products according to a number of surveys that were conducted

an institutional theory perspective on sustainable practices across the dairy supply chain the need for sustainable practices in the food supply chain particularly in the area of energy reduction is becoming acute the food industry currently has to contend with multiple competing pressures alongside the new challenges of sustainable production we applied institutional theory to explore the role of supermarkets in the development of legitimate sustainable practices across the dairy supply chains the paper focuses on dairy supply chain organizations and their consumption of energy we conducted 70 semi structured telephone interviews with various stakeholders across the supply chain findings revealed that the majority of actors in the supply chain identified supermarkets as the dominant player and that the supermarkets exert pressure on other smaller organizations across the supply chain although some organizations wished to pursue a sustainable agenda through integrating new rules and legitimate practices within their own organization the dominant logic appeared to be one of cost reduction and profit maximization there was also evidence that supermarkets and other large organizations attempt to replicate publicly available information on green successes for image purposes we conclude that the dominant logic of cost reduction is so well established that challenging the dominant logic may prove difficult the challenge is therefore to complement the dominant logic with sustainable practices across the whole supply chain a role government needs to play this will require a broader more systemic approach to encouraging sustainable practices including investment and financing practices so that all members of the dairy supply chain can co operate and contribute to energy reduction

identification and estimation of money demand in most natural sciences physics chemistry biology theories are validated by controlled experiment however in other natural sciences astronomy meteorology and in most social sciences including economics the data are characteristically generated not by experiment but by measurement of uncontrolled systems in economics theories take the form of restrictions on the models assumed to generate the data and statistical methods replace experimental controls in testing these restrictions and here is the difficulty in economics particularly macroeconomics the theory used to derive tests ordinarily does not generate a complete specification of which variables are to be held constant when statistical tests are performed on the relation between the dependent variable and the independent variables of primary interest accordingly in such cases there will be a set of often very different candidate regression based tests each of which has equal status with the others since each is based on a different projection of the same underlying multivariate model except in the unlikely event that the explanatory variables are mutually orthogonal the conditional regression coefficients which generally form the basis for the test statistic will depend on the conditioning set we conclude from this that if a theory which does not generate a complete specification of the regression test is nonetheless to have testable implications these implications must be robust over the permissible alternative specifications if the restrictions indicated by the theory are satisfied in some projections but not in others that have an equal claim to represent implications of the theory one cannot conclude that the theory has been confirmed the fact that the observable implications of valid theories must obtain over a broad but usually incompletely specified set of regressions rather than for a single regression introduces a large and unavoidable element of imprecision into hypothesis testing in macroeconomics generally it appears to be appropriate to weaken the statistical criterion for rejecting theories consider for example the theory of money demand which will engage our attention in this paper the tobin baumol square root formula implies that the elasticity of money demand with respect to the interest rate is exactly one half but which interest rate should wealth be held constant inflation in view of such uncertainties it would be inappropriate to insist in a literal minded fashion on rejecting the tobin baumol model if in some regression the measured interest elasticity differed from one half by more than two standard deviations and only then obviously a more flexible approach is called for the practice has been to conclude that the statistical evidence is consistent with the tobin baumol model as long as the interest rate coefficient is negative if it is negative and significant or negative and insignificantly different from minus one half that would provide somewhat stronger confirmation but a positive coefficient particularly a significantly positive coefficient would be viewed as raising questions about the validity of the theory in macroeconomics generally as in the money demand application the typical response to specification uncertainty has been to regard a theory as supported if the signs of the estimated coefficients agree with those expected from theory and as disconfirmed otherwise there is no theoretical justification for this procedure but it seems to be a reasonable course to follow the point that economic theory ordinarily generates incompletely specified statistical university of california santa barbara we have received helpful comments from andrew abel robert clower michael darby robert engle stephen goldfeld david laidler edward leamer robert lucas frederic mishkin and edward prescott thomas hall provided able research assistance

duopoly and quality standards abstract in the absence of sunk costs a low quality producer benefits from a mildly restrictive quality standard whereas a high quality producer suffers from it consumers welfare increases if the firm producing the higher quality does not increase its quality significantly in response to the increase in quality by its rival a sufficiently severe standard causes exit from the industry when there are no sunk cost the high quality producer exits first