estimating sectoral and geographical industrial pollution inventories in india implications for using effluent charge versus regulation developing countries are increasingly concerned about the growing pollution levels in cities because of the lack of reliable information on the nature and magnitude of emissions discharges from various industrial sources it is difficult for regulators to formulate cost effective strategies for industrial pollution control this article uses the industrial pollution projection system database to estimate the industrial pollution load and the associated abatement cost which can be used to design cost effective strategies for pollution control the article also illustrates the cost effectiveness of market based instruments such as effluent charge vis a vis regulation

the effect of process management on different types of innovations an analytical modeling approach abstract we investigate the trade off between r d efficiency and creativity during the development of a new product a firm s ability to balance efficiency with innovation positively affects its capacity to maintain its competitiveness although the trade off between efficiency and creativity has long been discussed in terms of practical application little analytical research has been performed to enhance theoretical understanding to redress this gap in the literature we present an extreme value model that accounts for innovation type and competition intensity and offer a set of theoretical and practical insights to demonstrate that the effects of process management depend on the nature of the innovation employed we show that the inverse relationship between efficiency and creativity is more pronounced if r d projects represent paradigm shifting innovations rather than incremental innovations we then demonstrate how competition drives firms to decrease investment in innovation activities and improve process efficiency to maximize profit our results suggest that process management activities are less recommended for firms that pursue radical innovation and the acceleration of growth

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

private agri food standards implications for food policy and the agri food system abstract this paper provides a brief introduction to the evolution and nature of private food safety and quality standards highlighting the resultant impacts on the structure and modus operandi of supply chains for agricultural and food products and the challenges posed for processes of agricultural development it serves as an introduction to a series of papers that provide a comprehensive overview of the current state of knowledge regarding private food safety and quality standards in both an industrialised and developing country context in so doing it aims to provide a catalyst for further research on this rapidly evolving field of inquiry

dynamic control of a monopolist s product and process innovation with reference quality our main purpose is to investigate the dynamic control problem of a monopolist s product and process innovation under reference quality the main features of this article are i a monopolist deal

efficient inventory control for imperfect quality items in this paper we present a general eoq model for items that are subject to inspection for imperfect quality each lot that is delivered to the sorting facility undertakes a 100 per cent screening and the percentage of defective items per lot reduces according to a learning curve the generality of the model is viewed as important both from an academic and practitioner perspective the mathematical formulation considers arbitrary functions of time that allow the decision maker to assess the consequences of a diverse range of strategies by employing a single inventory model a rigorous methodology is utilised to show that the solution is a unique and global optimal and a general step by step solution procedure is presented for continuous intra cycle periodic review applications the value of the temperature history and flow time through the supply chain is also used to determine an efficient policy furthermore coordination mechanisms that may affect the supplier and the retailer are explored to improve inventory control at both echelons the paper provides illustrative examples that demonstrate the application of the theoretical model in different settings and lead to the generation of interesting managerial insights

do supermarkets change the food policy agenda summary policy makers want supermarkets to serve the interests of important groups in society especially small farmers and the owners of traditional small scale food wholesale and retail facilities but consumer issues are also important including internalizing the full environmental costs of production and marketing and helping supermarkets be part of the solution to the health problems generated by an affluent diet and lifestyle this paper places the supermarket debate in the broader evolution of food policy analysis a framework for integrating household market macro and trade issues as they affect hunger and poverty increasingly supermarkets provide the institutional linkages across these issues

product and process innovation the implication of making comparisons between uniform pricing monopolist and second degree price discriminating monopolist the question of simultaneous product and process innovation price discrimination is crucial for technologically evolving industries in this paper we assume that there are two different kinds of

dynamic quality policies with reference quality effects abstractdynamic pricing policies with reference price demand have been intensely analysed less studied are dynamic quality policies with reference quality demand this article studies the dynamic quality policy of a firm whose consumers use a reference point in their decision making in line with the principles of behavioural economics more specifically i consider reference quality formation in an optimal control setting by solving on the basis of pontryagin s maximum principle i obtain analytical solutions to the optimal quality policy the managerial implications of quality reference for dynamic quality policy are discussed

dynamic optimal control of process product innovation with learning by doing abstract in this paper we present a dynamic optimal control model of process product innovation with learning by doing and extend the model of chenavaz 2012 to an even more general model in which the firm s cost functions of product and process innovation depend on both the innovation investments and the knowledge accumulations of product and process innovation furthermore in our paper the product price the investments of product and process innovation are decision variables the product quality production cost the change rates of knowledge accumulations of product and process innovation are state variables the main objective of this paper is to analyze the relationships between these variables and investigate the model s optimal conditions and characteristics further we solve the model with some numerical examples and sensitivity analysis is conducted to study the effect of changing the parameters and coefficients on the objective function value

process and product innovation by a multiproduct monopolist a dynamic approach abstract we adopt a dynamic approach to model the behaviour of a multiproduct monopolist investing in process innovation and either product differentiation or product proliferation or both irrespective of the number of activities appearing in the r d portfolio we prove that depending on initial conditions there may exists substitutability between process innovation and either form of product innovation along the optimal path towards the steady state while in the latter only complementarity emerges looking at the threefold investment plan we qualitatively characterise the ranking of r d activities in terms of the consumer reservation price and the extent of the spectrum of varieties

demand heterogeneity and technology evolution implications for product and process innovation the evolution of technology has been a central issue in the strategy and organizations literature however the focus of much of this work has been on what is essentially the supply side of technical change the evolution of firm capabilities we present a demand based view of technology evolution that is focused on the interaction between technology development and the demand environment in which the technology is ultimately evaluated we develop a formal computer simulation model that explicitly considers the influence of heterogeneity in market demand the presence of consumers with different needs and requirements on firms innovation choices the model is used to examine the dynamics of product and process innovation utterback and abernathy 1975 the analysis reveals that demand heterogeneity offers an alternative to supply side explanations of the technology life cycle further by considering the implications of decreasing marginal utility from performance improvements the model highlights the role of technologically satisfied consumers in shaping innovation incentives and suggests a rationale for a new stage in the technology life cycle characterized by increasing performance at a stable price the stage has not yet been treated formally in the literature but is widely observed most prominently in digital and information based technologies

an analysis of the dynamic price quality relationship abstract in this paper we develop a dynamic model in which demand depends on both price and quality the objective function maximizes the profit and the salvage value of the firm in part quality can be increased by investing into development processes and the value of the accumulated quality knowledge is incorporated into the model it is pointed out that this salvage value may have large impact on the solution and fundamentally may influence the dynamics of the quality improvement process the quality dynamics may have both increasing and decreasing impact on price and besides known factors the influence of the hamiltonian is identified we can observe also that improving operational efficiency softens price increase while quality increases

consumer preferences and product and process r d firms often conduct both product and process r d consumer preferences typically play a vital role in determining these r d choices the economics literature however has mostly ignored the interrelationship between the r d choices of firms and consumer preferences istudy product and process r d from the perspective of their relationship with consumer preferences in doing so i find a novel distinction between the two kinds of r d this distinction can explain several empirical observations regarding firms choices of the two and can also potentially enable us to better empirically identify the two

plant level productivity efficiency and environmental performance of the container glass industry this paper presents a methodology and empirical results based on themalmquist productivity index we measure productivity while treatingpollution as an undesirable output our estimates show that technicalchange has contributed to productivity and environmental performancegrowth in the container glass industry an energy and pollution intensivesector changes in inter plant efficiency over time have made thisproductivity growth more rapid than otherwise would have occurred withthe underlying technical change the efficiency estimates show that thereare both opportunities to improve productivity and reduce pollution in thisindustry as well as productivity losses associated with the emissionscontrol the shadow prices for nox the undesirable output we analyze is quite high compared to other regulated sectors

an analytical framework for retailer price and advertising decisions for products with temperature sensitive demand abstractthe demand for weather sensitive products such as beverages ice creams or chocolate varies with changes in temperature yet retailers lack a framework to adapt the marketing mix element

coffee value chains on the move evidence in ethiopia abstract important changes have happened to the upstream segment of the coffee sector in ethiopia africa s biggest in the last decade as illustrated by the increasing adoption of improved production harvest and post harvest practices upstream marketing has also improved and there have been large investments in processing capacity shown by the extended coverage of wet mills these improved practices are shown to be associated with positive impacts on coffee productivity and prices changes appear to be linked with multiple factors including local market reform greater presence of public extension agents high international prices and a push for certification by international buyers on the other hand a combination of production lack of improved seedlings weather and disease shocks as well as institutional issues saving constraints and lack of vertical integration and traceability have seemingly impeded more widespread uptake of improved practices and therefore better farm performance the study illustrates the significant complexity in obtaining transformation at the farm level in these settings

stochastic competitive entries and dynamic pricing abstract how should firms price new products when they do not know the timing nor the nature of the next competitive entry to guide managers pricing decisions in such contexts we propose a dynamic pricing model with two types of randomly timed entry i e imitative and innovative the characterization of the equilibrium strategies reveals how optimal prices vary with the manager s knowledge about the timing of future competitive entries we show that price skimming is not always optimal when entry dates are unknown to managers everything else equal we demonstrate that the randomness of competitive entries make forward looking managers to choose constant prices even though the characteristics of the market would have justified skimming the demand in the normal course moreover we show that the constant pricing policy remains optimal even when the incumbent s optimal pricing strategy influences the probability of facing a competitive entry finally we find that uncertainty does not necessarily hurt firms profits

water pollution abatement by chinese industry cost estimates and policy implications using factory level data provided by china s national environmental protection agency and the tianjin environmental protection bureau the authors of this report estimate the costs of water pollution abatement for chinese industry using their econometric results they analyze the cost effectiveness of current pollution control policy in china and make the conclusions that follow 1 for each pollutant marginal abatement costs exhibit great differences by sector scale and degree of abatement 2 the benefits of stricter discharge standards should be weighed carefully against the costs 3 emissions charges as low as 1 per ton would be sufficient to induce 80 percent abatement of suspended solids chemical oxygen demand and biological oxygen demand respectively 4 the current regulatory system provides an economic incentive to abate by charging a levy on pollution that exceeds the standard the results of this analysis suggest however that changing to a full emissions charge system would greatly reduce overall abatement costs the approach the authors recommend for measuring the costs of abatement is to use joint abatement cost functions that relate total costs to treatment volume and the simultaneous effect of reductions in suspended solids chemical oxygen demand biological oxygen demand and other pollutants tests of alternative functional forms suggest that a simple constant elasticity model fits the data as well as a complex translog model does permitting sophisticated policy experiments with relatively simple calculations

a dynamic analysis of investment in process and product innovation with learning by doing this paper investigates the optimal control problem of a monopolist s investments in process and product innovation under learning by doing in a dynamic setting we show that i there exists the saddle stable steady state under monopolist optimum and social optimum ii the learning rates of product and process innovation affect not only the monopolist s process or product innovation investments but also the complementarity substitutability relationship between product and process innovation iii the social incentive towards both product and process innovation is always larger than the private incentive characterizing the profit seeking monopolist these results are valuable complement and development to the results drawn from the standard product and process innovation model

product and process innovation with knowledge accumulation in monopoly a dynamic analysis abstract in this paper we investigate monopolist optimal investment levels using a dynamic model under knowledge accumulation we show that i investment decisions in product and process innovation are independent of each other ii under both the monopolist and the social optimum there exist the saddle stable steady state equilibria iii optimal investment levels in product and process innovation positive response to learning rate and knowledge accumulation rate inversely response to knowledge depreciation rate

modeling the impact of product quality on dynamic pricing and advertising policies abstract the marketing mix of price quality and advertising quality relationship is well studied less understood is the price advertising quality relationship this article fills the gap investigating the interplay between price advertising and quality in an optimal control model our results generalize the condition of dorfman steiner in a dynamic context also they point to the impact of greater product quality on the dynamic policies of pricing and advertising furthermore a phase diagram analysis shows that quality develops monotonically in time and converges to a unique steady state we also show that quality investment could either decrease or increase over time but this depends on its effectiveness our results spot the profitable opportunities of a firm managing a more complex marketing mix

prisoner s dilemma on behavioral choices in the presence of sticky prices farsightedness vs myopia abstract when making decisions in a dynamic environment myopic supply chain members tend to ignore the future effects of their decisions on the evolution of state dynamics by contrast far sighted decision makers consider about the impacts of current decisions on both current profits and future profits in order to study how behavioral choices affect the operation decisions and profits of supply chain members we develop a differential game with sticky prices where one manufacturer purchases components from one supplier and makes final products for end customers the supplier decides on its wholesale price while the manufacturer sets its production quantity either of supply chain members has two behavioral choices myopia and farsightedness we derive and compare equilibrium solutions under four different behavioral combinations our analysis shows that there always exists a prisoner s dilemma caused by behavioral choices farsightedness is a dominant strategy for either the supplier or the manufacturer but both to act myopically makes both of them better off furthermore comparing with other scenarios the whole supply chain obtains the highest profit when both players are myopic in addition we introduce a revenue sharing contract with static wholesale price to mitigate the adverse impacts of the prisoner s dilemma

dynamic pricing product and process innovation abstract the question of simultaneous dynamic pricing product and process investment policies is crucial for manufacturing and high tech industries this paper models these policies in an optimal control setting on the supply side the firm sets prices product and process investment levels over time on the demand side current demand depends on price and quality under an additive separable demand function dynamic pricing increases with quality and cost therefore both product innovation and process innovation impact the pricing policy under a multiplicative separable demand function dynamic pricing policy follows the dynamic of production cost and is independent of the evolution of product quality thus process innovation is the main determinant of a firm s pricing policy over time and product innovation has no impact

the dynamics of price quality and productivity improvement decisions abstract although quality has received significant attention during the last decades and its economic benefits are beyond any doubt lots of questions have remained unanswered as to how much when and in what to invest to maintain sustainable competitive advantage a model is introduced here to guide a firm in addressing these questions the firm produces a single product and operates in a market where monopolistic competition is effective demand for the product in the industry depends on both price and performance quality increasing productivity knowledge decreases unit production cost but demand for the company s product decreases over time as competitors will be able to offer products with similar performance productivity and quality knowledge can be developed through induced and autonomous learning in order to strengthen company position the paper provides an optimal control formulation of the problem and develops necessary conditions for optimality and characterizes the dynamics of optimal price quality and investment decisions

organic certification agro ecological practices and return on investment evidence from pineapple producers in ghana the recent empirical literature on economic sustainability of certified export crops shows that certification standards that enhance yields are important for improving farm revenues and household welfare however limited evidence exists on the impact of organic certification on the adoption of agro ecological practices in this study we use unique farm level data from pineapple producers in ghana to examine the impact of organic certification on the use of agro ecological practices such as organic fertilizers organic pest and weed control crop rotation and soil and water conservation as well as how using these measures affect farm outcomes such as return on investment our empirical results reveal that organic certification increases agro ecological practice use although from a very low starting point using a generalized propensity score approach we show that there is a positive but nonlinear relationship between the intensity of agro ecological practice use and return on investment

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