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

quality based competition profitability and variable costs we consider the impact of variable production costs on competitive behavior in a duopoly where manufacturers compete on quality and price in a two stage game in the pricing stage we make no assumptions regarding these costs other than that they are positive and increasing in quality and no assumptions about whether or not the market is covered in the quality stage we investigate a broad family of variable cost functions and show how the shape of these functions impacts equilibrium product positions profits and market coverage we find that seemingly slight changes to the cost function s curvature can produce dramatically different equilibrium outcomes including the degree of quality differentiation which competitor is more profitable the one offering higher or lower quality and the nature of the market itself covered or uncovered our model helps to predict and explain the diversity of outcomes we see in practice something the previous literature has been unable to do

proposing a new approach to discussing economic effects of design quality abstract as the concept of six sigma has been the dominant theme in the recent wave of quality initiatives a body of related theoretical work slowly starts to evolve some contributions discuss the economic implications of better production quality and therewith provide the rationale for companies to strive for six sigma defect levels opposed to this the complementary concept of design quality has received little recent attention previous contributions in the economics operations or marketing literatures equate design quality to product differentiation and analyse economic implications of different product categories however this discussion is not providing insights into the economic effects of deviating from design optimality in the choice of a product s design such analysis would have great relevance for companies as they aim at addressing customer needs in the most precise way possible to avoid failure in the market in this paper we therefore discuss the economic effects of design quality using a novel focus on deviations from optimum designs we find that deviations from both optimal feature composition and optimal production technology likely result in losses similar to those commonly attributed to poor production quality one important implication of our approach is that higher design quality must not as commonly assumed be connected to higher production costs but might in fact reduce the cost level with our contribution we aim at providing a rationale for investments in design quality improvement a complement to the economic analysis of production quality and an inspiration for future empirical studies

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

quality and competition in recent years the practitioner literature in operations management has seen a dramatic surge in articles on quality management it reflects the increased emphasis on quality by u s firms which has been attributed largely to increased competition faced by them the question of how quality is influenced by competitive intensity however has not received much attention either in the practitioner or the academic research literatures the notion of competitive intensity itself has not been defined precisely in this paper we develop formal models of oligopolistic competition to investigate whether equilibrium levels of quality increase as competition intensifies we consider three different competitive settings i asymmetric duopolistic competition where the dominant firm s intrinsic demand potential decreases ii a symmetric duopoly where the firms are precluded from cooperating in setting quality levels and iii symmetric oligopolistic competition where the number of firms increases we find that the relation between equilibrium quality and competitive intensity depends on what is understood by increased competition and in addition the relation is contingent on the values of parameters describing the cost and demand structure for the industry

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

technological expectations and adoption of improved technology abstract attention is focused upon the adoption demand rather than the creation supply of new technology which improves from time to time based on the expected flow of technological progress over which the firm demander has no control it must decide either to adopt the current best available technology or to postpone adoption the distinguishing features of the model are that more than one technological innovation is anticipated and expectations about the likelihood of such innovations are revised as time passes since the last innovation our analysis shows that the firm will adopt the current best practice if its technological lag exceeds a certain threshold moreover as time passes without new technological advances it may become profitable to purchase a technology that has been available even though it was not profitable to do so in the past

guns and butter and government popularity in britain britain under the government of prime minister thatcher provides a unique opportunity to probe the effects of both war and macroeconomic performance on government popularity monthly ratings for thatcher and conservative party support june 1979 to july 1985 are examined by way of box tiao intervention models the model that best captures the impact of the falklands war of 1982 is of the gradual temporary variety popularity gains accrued through the three month war shrink in a geometric fashion nevertheless they prove to be worth over five percentage points for the conservative party a year later in the 1983 election macroeconomic performance meanwhile is found to have an asymmetric effect on government popularity with unemployment strongly significant but inflation not significant at all apparently the british public is punishing failure on employment while letting success on inflation go unrewarded qualifications of the positive effect of war and the negative effect of macroeconomic performance are suggested

technological accumulation diversification and organisation in uk companies 1945 1983 a survey of more than 4 000 significant innovations and innovating firms in the uk from 1945 1983 shows that the scope and organisation of technological activities vary greatly as functions of firms principal activities and size 1 technological opportunities and threats are greatest in firms in chemicals and engineering opportunities in such science based and specialist supplier firms in general emerge horizontally in related product markets and downstream in user sectors in scale intensive e g steel vehicles and supplier dominated e g printing construction firms opportunities tend to be upstream in related production technologies breakthrough innovations in science based firms also induce clusters of technological opportunities upstream for suppliers horizontally for partners and downstream for users their effective exploitation requires diversity of firms technological activities greater than that strictly required for current output 2 the nature of technological opportunities and of organisation for their exploitation also varies with firm size firms with fewer than 1 000 employees have major opportunities with specialised strategies in mechanical engineering and instruments the prevalence of broad front technological strategies and of divisionalisation increases sharply with firm size together with dependence on formal r and d activities the size of innovating divisions has diminished sharply over the period divisionalisation improves the goodness of fit between the core business of innovating divisions and the innovations themselves but 40 have remained consistently outside the core business of divisions 3 these findings help identify the key tasks of technological strategy in firms in different industries and of different sizes thus in large firms divisionalisation can create the small size of unit conducive to effective implementation but it cannot absolve central management from the continuous task of matching technological opportunities with organisational forms and boundaries

information capacity and innovation adoption researchers of innovation adoption and diffusion often have tested the hypothesis that firms with greater capacities to gather and evaluate information should adopt sooner however the data generally do not support this hypothesis a theoretical model of innovation adoption under uncertainty is developed to show that greater information capacity implies not only faster learning which tends to reduce the expected delay until adoption but also a more stringent adoption criterion which tends to increase the expected delay the resulting ambiguity provides an explanation for the lack of empirical support for this hypothesis

uncertainty competition and the adoption of new technology faced with the decision of whether or not to adopt a new technology whose economic value cannot be gauged with certainty the manager of the firm may elect to decrease the uncertainty by sequentially gathering information at a unit cost of c 0 updating his prior beliefs in a bayesian manner uncertainty regarding the actions of a competitor however cannot be reduced our model allows a manager to account for potential competition either substitute or complementary by inclusion of strategic considerations modelled in a game theoretic setting we show that the firm s best response mapping satisfies a dynamic programming recursion even when the one period reward function is unbounded providing management with a familiar tool to solve its problem best response behavior is characterized by a monotone sequence of pairs of threshold numbers which give rise to a cone shaped continuation region the continuation region is shown to shift up down with increases in the expected level of substitute complementary competition making the firm less more likely to adopt the innovation finally the existence of a nash equilibrium in cone shaped strategies is established

adoption and diffusion of an innovation of uncertain profitability the argument has frequently been made that the pattern of diffusion associated with most new innovations will typically have certain characteristics a diffusion curve for an innovation is usually defined as the proportion of its potential users who have already adopted as a function of time measured from the first adoption many empirical studies by both economists and other social scientists have shown that diffusion curves nearly always have two distinct characteristics i they are s shaped the proportion adopted is an increasing function of time which is initially convex but eventually becomes concave and ii they tend to be right hand skewed the inflection point occurs at a time corresponding to a proportion adopted which is less than one half so that the function is concave over the greatest amount of time in fact this skewing is occasionally severe enough to make the diffusion curve appear concave everywhere the focus of most empirical studies of innovation diffusion has centered on identification of either the major determinants of the speed of diffusion or the characteristics of firms which determine how long they delay adoption the seminal contributions are griliches 6 study of hybrid corn and mansfield s 121 study of 12 industrial innovations these studies and most of the similar ones following conclude that diffusion is faster for innovations with higher profitability and that large firms tend to be the earliest adopters some studies e g mansfield 121 herregat 71 have attempted to ascertain

gaining on the swings the changing geography of the flow of the vote and government fortunes in british general elections 1979 1992 pattie c j johnston r j and fieldhouse e 1993 gaining on the swings the changing geography of the flow of the vote and government fortunes in british general elections 1979 1992 reg studies 28 141 154 the results of british elections during the 1980s produced a politically polarized country with the labour party increasingly thrown back on support in the urban industrial areas of the north and the conservatives making gains throughout much of the south the first general election of the 1990s is investigated to see whether this trend has continued into the new decade analysis of the constituency flow of the vote suggests that britain is less polarized in the 1990s than in the 1980s but that the electoral geography of the country still favours the conservatives pattie c j johnston r j et fieldhouse e 1994 un revirement d opinion l evolution des tendances electorales et le sort du gouvernement au moment des elections legislatives en grande bretagne de 1979 a 1992 reg studies 28

a debt owing democracy the political impact of housing market recession at the british general election of 1992 the 1992 british general election took place in the context of a severe housing recession which hit hardest in those regions from which the government usually drew much of its electoral support the slump notwithstanding however the government went on to win its fourth successive election victory the paper investigates the impact of the housing recession on the geography of the vote at the 1992 general election party fortunes were linked to local housing market conditions and the failure of the housing market was a factor in reducing support for the government negative equity is identified as a particularly important problem in this regard

innovation adoption and diffusion when there are competing innovations abstract firms face a choice between two innovations without knowing which of the two is better each firm has a prior that one of the innovations is better which is updated by bayes rule as trials with the innovations are made a simple decision rule indicating which innovation should be tried given any posterior is derived and used to define an expected diffusion curve for the better innovation this curve has the commonly observed ogive shape even in the absence of any external demonstration effect when the distribution of firm priors belongs to a general class

information and profitability estimates modelling the firm s decision to adopt a new technology this paper uses a response surface based on catastrophe theory to examine the interaction of information and profitability estimates on the firm s adoption of a new technology or innovation as such the paper builds on the conceptual ideas behind mccardle s 1985 work an illustrative example using simulated data is presented to indicate how one might operationalize the key constructs for the purpose of estimating the model

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

the politics of structural change swedish social democracy and thatcherism in comparative perspective the 1930s and the 1980s were decades of significant political economic change in the capitalist democracies depression and the rise of the industrial working class created opportunities for the establishment of social democracy in the 1930s stagflation and the decline of the working class made possible waves of radical rightist reform however this article suggests that only governments that do not have to concentrate myopically on the exigencies of winning the next election have the political space to undertake structural changes the benefits of which may only be manifest in the medium term in turn successful reforms are likely to entail changes in underlying social structural conditions such as the strengthening or weakening of organized labor movements that both expand the electoral constituencies of the government s partisanpreferred policies and improve their macroeconomic efficacy these propositions are examined with respect to the construction social democracy in sweden in the 1930s and the

uncertain search a model of search among technologies of uncertain values in the standard search problem there is an infinite pool of items whose distribution of values is known a decision maker draws an item from the pool observes its value and decides whether to keep it or to draw another item he can keep only one item and he seeks the item with the largest value in the standard uncertainty resolution problem there is only one item and the value of that item remains uncertain even after it is drawn the decision maker sequentially collects observations on the value of the item and decides whether to keep the item discard the item or take another observation uncertain search marries the sequential drawing from a pool of items from the search literature with the unknown value of a drawn item from the uncertainty resolution literature presented in the context of technology adoption it considers drawing from a pool of new technologies whose values remain unknown even after being drawn the decision maker sequentially purchases information in order to bayesianly update

shared savings contracts for indirect materials in supply chains channel profits and environmental impacts there are many materials for which the quantity needed by a firm is at best indirectly related to the quantity of final product produced by that firm such as solvents in manufacturing processes or office supplies for any such indirect materials an inescapable incentive conflict exists the buyer wishes to minimize consumption of these indirect materials while the supplier s profits depend on increasing volume both buyer and supplier can exert effort to reduce consumption hence making the overall supply chain more efficient however no supplier will voluntarily participate unless contract terms are fundamentally revised this can be done through a variety of shared savings contracts where both parties profit from a consumption reduction this paper analyzes several such contracts currently in use for chemicals purchasing we show that such contracts can always increase supply chain profits but need not lead to reduced consumption we analyze equilibrium effort levels consumption and total profits and show how these change with the contract parameters we find that the goals of maximizing joint profits and minimizing consumption are generally not aligned also surprisingly a decrease in a cost parameter can lead to a decrease in profits it may be necessary but is always possible to renegotiate the shared savings contract to reap the benefits of a cost decrease

consumer heterogeneity and strategic quality decisions though recent studies show that quality differentiation is an equilibrium outcome products of similar qualities frequently are observed in the marketplace this inconsistency may be explained by incorporating consumer heterogeneity along unobservable attributes into a model of competition in this paper consumers not only take into account the quality and price of a product but also their heterogeneous tastes along other attributes which are unobservable to firms we investigate the effect of heterogeneity along the unobservable attributes on both quality and price equilibrium in a two stage game framework we show that when consumers are sufficiently heterogeneous along the unobservable attributes the firms offer products of identical qualities in equilibrium under low levels of heterogeneity along the unobservable attributes however our results are consistent with past research which argues for quality differentiation

a game theoretic approach for green and non green product pricing in chain to chain competitive sustainable and regular dual channel supply chains abstract nowadays sustainable supply chain has become an exciting concept during the academic societies this paper considers environmental and economic aspect of sustainability due to environmental concerns the entry of green products into today s markets is on the rise how to compete for the production of green products with non green products is essential in these markets therefore this research focuses on the pricing and determination of the degree of greenness of a product in competition with a non green product this study for the first time investigates the pricing of two substitute products a green product produced by one manufacturer and a non green product produced by a second manufacturer under two dual channel supply chains including retail and internet channels the decision variables for one manufacturer are the price and degrees of eco friendliness of the green product for the other the decision variable is the price of the non green product this problem is solved under two different scenarios centralized and decentralized in the decentralized scenario a stackelberg competition is considered between the retailer level and the manufacturer level of the total supply chains in which the manufacturers are assumed to be the leader and the retailers are the followers in the centralized scenario players in each of their related supply chain are integrated the problem is solved and compared under two scenarios finally both parametric and numerical analyses are presented and some managerial insights are provided and some of which are as follows the centralized scenario cause to achieve high the green degree comparing with the decentralized scenario

economic perspectives on the development of complex products for increasingly demanding customers rival firms produce products with a variety of characteristics it is typically assumed that consumers purchase those products that most closely match their ideal set of characteristics orthodox production theory economics offers no analysis of how to divide limited product development budgets between different characteristics furthermore orthodox consumer economics assumes buyers make compensatory trade offs between different product characteristics this approach ignores problems caused by bounded rationality that in complex choice environments leads buyers to formulate simplifying heuristics such as hierarchical non compensatory preferences over characteristics an integrative analytical framework is developed drawing upon orthodox economics behavioural economics and evolutionary economics implications for the relationship between incremental product development and the firm s evolving capabilities are emphasized

information acquisition and the adoption of new technology the profitability of a new technology is rarely known with certainty at its announcement date consequently prior to making an adoption decision it behooves the firm considering the adoption of this innovation to reduce the level of uncertainty associated with its profitability the firm accomplishes this by sequentially gathering information updating its prior estimate of profitability in a bayesian manner quantifying the uncertainty regarding the innovation permits application of dynamic programming techniques criteria are derived which tell the firm when to stop collecting information and make the adoption decision it will be shown that it is optimal for the firm to continue to collect information until its estimate of profitability crosses one of two thresholds upon crossing the upper threshold the firm adopts the technology whereas the firm rejects the technology if the lower threshold is crossed the model predicts that even the manager who behaves optimally will occasionally adopt unprofitable technologies and reject profitable ones

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

product development decisions a review of the literature this paper is a review of research in product development which we define as the transformation of a market opportunity into a product available for sale our review is broad encompassing work in the academic fields of marketing operations management and engineering design the value of this breadth is in conveying the shape of the entire research landscape we focus on product development projects within a single firm we also devote our attention to the development of physical goods although much of the work we describe applies to products of all kinds we look inside the black box of product development at the fundamentaldecisions that are made by intention or default in doing so we adopt the perspective of product development as a deliberate business process involving hundreds of decisions many of which can be usefully supported by knowledge and tools we contrast this approach to prior reviews of the literature which tend to examine the importance of environmental and contextual variables such as market growth rate the competitive environment or the level of top management support

on the diffusion of new technology a game theoretic approach this paper is an attempt at a rigorous albeit not exceedingly general analysis of the diffusion of new technology in particular consider an industry composed of two firms each using the current best practice technology the firms are assumed to be operating at nash equilibrium output levels generating a market price given demand and profit allocations when a cost reducing innovation is announced each firm must determine when if ever to adopt it based in part upon the discounted cost of implementing the new technology and in part upon the behavior of the rival firm if either firm adopts before the other it can expect to make substantial profits at the expense of the other firm on the other hand the discounted sum of purchase price and adjustment costs may decline with the lengthening of the adjustment period as various quasi fixed factors become more easily variable therefore although waiting costs the firm more in terms of foregone profits it may save money on the cost of purchasing the new technology thus the firm must weigh the costs and benefits of delaying adoption as well as take account of its rival s strategic behavior

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

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

optimal quality and quantity provisions for centralized vs decentralized distribution market size uncertainty effects abstract we provide insights on how market size uncertainty affects the optimal quality quantity provision in distribution channels when consumers are heterogeneous in their willingness to pay for product quality in this context we denote the difference between the manufacturer s optimal quality quantity provision for a centralized channel and its optimal analog for a decentralized channel as the quality quantity differential we find that market size uncertainty creates or increases the quantity differential but it does not affect the differential s polarity in contrast market size uncertainty decreases the quality differential and it does so to the extent that depending on the level of consumer heterogeneity it reverses the differential s polarity moreover we find that the higher the inherent uncertainty level the more pronounced are the effects we likewise find that the effects of market size uncertainty are amplified if the notion of consumer heterogeneity is replaced with retail level competition