price adjustment and market structure a reply1 winters comment essentially concerns the econometric methods used to estimate the adjustment concentration relationship in this reply it will be shown that the suggested estimation methods do not alter our earlier conclusions some new econometric estimates indicate that the original findings should stand without major qualification and consequently winters criticisms of our methodology are unjustified but first the broader question regarding the alleged link between concentration and inflation is examined anyone who reads the paper carefully cannot fail to realise that it is not about inflation what it does is to estimate the relationship between the speed of price adjustment and concentration as a test of the administered prices hypothesis 2 to suggest that the findings could have implications for inflation is entirely different from saying that they explain inflation these implications are twofold first bigger as associated with greater concentration lead to higher shortrun peaks in the rate of inflation following a shock which given the evidence on thresholds in the formation of inflationary expectations could have a significant influence on wage price dynamics 3 second constraints on the rate at which cost increases can be passed on could lead firms to absorb or resist these changes a factor stressed by the monopolies commission 1973 p 30 to which reference was made in the article

price inertia and market structure empirical evidence from austrian manufacturing 1993 price inertia and market structure empirical evidence from austrian manufacturing applied economics vol 25 no 9 pp 1175 1186

industry structure and the speed of price adjustment recent work has suggested that there is an association between the degree of concentration in an industry and the speed at which prices adjust to changes in prime costs cagan 8 domberger 12 13 scherer 21 p 356 and the references cited therein apart from its intrinsic interest to students of industrial economics there would seem to be three reasons for investigating this association first to see what light if any it throws upon the influence of industrial structure on the price level together with the rate and process of inflation secondly to test the assumption made in some influential studies e g godley and nordhaus 15 coutts godley and nordhaus 10 and haig and wood 18 that the size of the lag between cost and price changes is solely dependent upon the length of the fabrication production and delivery period in the various industries the third reason is a belief held by the author that distributed lag coefficients in econometric studies should be subject to analysis and not left hanging in the air as part of the development of a large scale econornetric model of the australian economy the imp model a team of researchers under the direction of dr brain at melbourne university have estimated price prime cost equations for 43 manufacturing sectors using annual data referring to the period 1948 49 1973 74 1 the estimating equation is of the form

a general equilibrium analysis of the insurance bonding approach to pollution threats abstract this paper sheds additional light on the important issue of toxic accidental releases or spills the pollution control literature contains relatively little discussion of accidental releases even risk assessments are more about the risks to the public of predictable continuous emissions than about the risk of major accidents because spills of stored and transported chemicals are not continuous or even inevitable analogs of economic incentive approaches like emissions fees and transferable pollution allowances are inappropriate allowances are inappropriate because potential spills are often too harmful to allow and a fee large enough to pay for clean up and damages is beyond the means of many potential sources the accidental release threat suggests an approach analogous to automobile liability insurance since a car can do more damage than most people can afford to pay for states mandate insurance to ensure financial responsibility some potential sources of harmful spills are already required to demonstrate financial responsibility and more could be insurance is one option for meeting financial responsibility requirements in many cases the only viable option to develop testable hypotheses and determine where traditional partial equilibrium analyses would probably be misleading the paper compares a very basic insurance bonding approach to the traditional command and control approach in a general equilibrium setting that allows a comparison of effectiveness and impacts on output levels prices and factor returns

environmental controls in extractive industries diverging from the literature on optimal resource extraction to consider the effects on a competitive resource industry s extraction rate of environmental controls or taxes designed to limit residual discharge this analysis embeds environmental regulations in a dynamic model in which a mineral industry uses physical capital to extract a nonrenewable resource from a fixed stock the analysis considers only flow pollution the most important pollutant being sulfur dioxide emissions from smelting and the leaking of toxic metals into ground water from mine tailing a comparison of controls and pollution taxes finds it impossible to design a fixed emission standard that will lead to optimal industry behavior the author designs a variable standard that can be firm specific in order to encourage resource conservation 32 references 2 figures

trade ins and introductory offers in a monopoly we model the commonly used marketing practices of offering discounts to either repeat buyers trade ins or new buyers introductory offers of a quasi durable good we analyze these practices in terms of their potential for intertemporal and third degree price discrimination in our two period model the monopolist sets a first period price that segments the second period market optimally into holders and nonholders of the good in the second period different prices are quoted to the two market segments we present three versions of the model with varying assumptions on consumers rationality

re framing the urban blight problem with trans disciplinary insights from ecological economics abstract similar to circumstances in the field of economics market fundamentalism dominates urban blight policy spaces in the u s despite criticisms of the paradigm unlike the unified alternative that ecological economics ee provides to conventional economic theory however disagreement over the meaning of blight has prevented a commonly held pre analytic vision and policy agenda from forming in critical blight scholarship this paper asserts that applied ee offers a framework in which to develop such a vision and to strengthen the inchoate critical blight policy stream we draw on the ee theory and concepts to argue that blight can be understood as a stock that accumulates in an urban system as a result of underinvestment into real property our conceptualization of the problem has several important implications for public policy a brief illustration compares the relative efficacy of one city s characteristically neoliberal blight policies with more ee consistent policies in a second city to show that the latter might in fact outperform the former

concentration and mobility statistics in canada s manufacturing sector mobility statistics are direct measures of the intensity of competition market structure indicators indirect measures in this regard the most widely employed measure of market structure is the concentration ratio despite the fact that structural measures provide only proxies for the extent of competition they are widely used by professional economic staff during the formulation and administration of competition policy this paper investigates the appropriateness of this approach it concludes that while concentration in canada s manufacturing sector has remained constant this masks considerable mobility the implications of this result are discussed copyright 1994 by blackwell publishing ltd

the economics of enforcing pollution taxation abstract the efficient structure of pollution tax policy is examined when it is recognized that enforcing compliance will be costly there are two components of this cost 1 the direct cost of enforcement and 2 the cost polluters incur avoiding enforcement considering only the first cost the efficient pollution policy calls for a tax in excess of that conventionally recommended as efficient t but with little enforcement once avoidance cost is recognized the efficient policy can be substantially altered requiring a tax lower than t but with greater enforcement even when direct enforcement cost is zero it is shown that there is no unique advantage to t in the absence of avoidance cost

optimal dynamic pricing for expanding networks this paper analyzes the dynamic pricing decision of a monopolist marketing a new product or service whose consumption value increases with the expansion of the network of adopters we characterize an optimal pricing strategy which maximizes the present value of the monopolist s profits subject to the dynamics of the demand for network access these dynamics depend among other factors on the current price and consumer anticipations about future network growth we examine the effects of changes in the growth anticipations and the discount rate on the optimal equilibrium access price and network size it is shown that higher growth anticipations and a lower discount rate result in a lower equilibrium price and a larger network

a decision model for financial assurance instruments in the upstream petroleum sector the main objective of this paper is to deepen the discussion regarding the application of financial assurance instruments bonds in the upstream oil sector this paper will also attempt to explain the current choice of instruments within the sector the concepts of environmental damages and internalization of environmental and regulatory costs will be briefly explored bonding mechanisms are presently being adopted by several governments with the objective of guaranteeing the availability of funds for end of leasing operations regulators are mainly concerned with the prospect of inheriting liabilities from lessees several forms of bonding instruments currently available were identified and a new instrument classification was proposed ten commonly used instruments were selected and analyzed under the perspective of both regulators and industry surety paid in and periodic payment collateral accounts letters of credit self guarantees investment grade securities real estate collaterals insurance policies pools and special funds a multiattribute value function model was then proposed to examine current instrument preferences preliminary simulations confirm the current scenario where regulators are likely to require surety bonds letters of credit and periodic payment collateral account tools

firm incentives to promote technological change in pollution control reply abstract the process of technological change in pollution control is broken into three basic steps innovation diffusion and optimal agency response firm incentives to promote these steps are then examined under five regulatory regimes direct controls emission subsidies emission taxes free marketable permits and auctioned marketable permits on a relative basis emission taxes and auctioned permits provide the highest firm incentives to promote technological change at times free permits generate lower incentives direct controls which are common regulatory tools usually provide the lowest relative firm incentives to promote technological change

endogenous technical change and environmental regulation abstract a model of environmental regulation under uncertainty is developed to compare the effect of price versus quantity rules upon technical change quantity rules tend to encourage more efficient levels of technical change

optimal pricing policy in the presence of experience effects i introduction in this paper we analyze the problem of optimal intertemporal pricing for a monopolist when cur rent and past output affect future cost and or demand conditions through experience in production and or in consumption learning by doing the experience curve contagion habit formation bandwagon and snob effects are all examples of terminologies used to describe such situations we call these experience effects for convenience and explore profit maximizing pricing behavior when such effects exist in the traditional profit maximization model a firm chooses the price output combination so as to maximize short run i e current profits the familiar mc mr equality given that price is higher than average variable cost and a nonbind ing capacity constraint is a necessary condition for price takers as well as price makers this as sumes that the current pricing decision has no bearing on the future so that long run profit is maximized by a series of short run maximizing

production externalities and long run equilibria bargaining and pigovian taxation this paper analyzes bargaining and pigovian taxation solutions to inefficiencies from production externalities with free entry the coase theorem fails in a decentralized context but remains valid if the property rights holder can act like a command economy planner a less powerful price taking rights holder s objective function is nonconcave causing an inefficient bargaining outcome bargaining complicates pigovian taxes with a nonlinear tax scheme required to sustain the optimum polluting firms pay a franchise tax whose revenue is given lump sum to consumers and face a marginal charge only on excess output which thus raises no revenue in equilibrium

european environmental taxes and charges recent experience issues and trends abstract the use of environmental taxes and charges in oecd countries increased by over 50 between 1987 and 1994 while revenues raised by environmental taxes and charges remain small relative to overall taxation they comprise a rising proportion in most european countries several european countries have either undertaken or are considering systematic shifts in taxes away from labour and onto the use of environmental resources potential negative effects on competitiveness and regressive distributional effects are the major cause of concern with regard to the introduction of environmental taxes a number of ways of mitigating such effects exist and have been implemented

potential for private cost increasing technological innovation under a tax based economic incentive pollution control policy a criticism of the current pollution control policy is its lack of incentive for technological innovation the author argues that the implementation of a tax based economic incentive policy may have its pay off in terms of lower real control outlays but this makes it possible for total private compliance costs resource costs and tax or transfer costs to actually increase upon the introduction of some new less expensive control technologies he presents a numerical illustration of this phenomenon then derives the conditions under which such cost increases may occur cost increasing technological innovations could generally be avoided if the tax incentive is coupled with a net revenue lid for the pollution control authorities 4 references 3 tables

envisioning shared goals for humanity a detailed shared vision of a sustainable and desirable usa in 2100 economics has been defined as the science of allocation of scarce resources towards alternative ends this definition implies that the first step in economic analysis is to determine what ends are desirable for society most sectors of the society would agree that sustainability is a desirable end but there is little agreement as to what a sustainable future would look like the university of maryland institute for ecological economics sponsored a democratic future search process designed to create a relatively detailed shared vision of a sustainable and desirable usa in the year 2100 this paper presents the vision developed at that conference examines the resources required to achieve the vision and assesses the suitability of market mechanisms for allocating the required resources towards the desired ends we find that markets are not efficient mechanisms for allocation in this case and propose the institutions of a strong democracy as a promising alternative 2002 elsevier science b v all rights reserved

opening the policy window for ecological economics katrina as a focusing event abstract ecological economics and its allied trans disciplinary fields are well established in academia but so far have failed to have significant influence on policy makers public policy research and theory suggest that three process streams must converge in order to shape the political agenda and change policy kingdon j 1984 agenda alternatives and public policies boston little brown first the problem stream emerges when an existing condition is defined as a problem a discrepancy between current reality and a desired goal and critical policy makers accept the definition of the problem the policy stream emerges as consensus grows around policy instruments to solve the problem the politics stream emerges as the national mood and leading politicians accept the gravity of the problem and are willing to implement the policies required to address it when these three streams converge a policy window is created that can move issues onto the political agenda and into formal policy a focusing event like katrina can bring these three process streams together however different strategic representations of the situation may allow entirely different problem definitions and policies to dominate the political agenda this paper analyzes the extent to which katrina has opened a policy window for ecological economics we find that katrina has strengthened the three streams necessary to create a policy window for ecological economics but that the dominant economic paradigm currently on the political agenda market fundamentalism is strategically presenting katrina as supporting its own problem stream and policy stream key elements of the ecological economic agenda such as investing in natural capital are making it on to the political agenda but overall market fundamentalist policies appear likely to dominate we argue that ecological economists have failed to galvanize public acceptance for the policy goals of sustainable scale and just distribution thus failing to effectively communicate their perspectives on problem definition and or policy solutions to policy makers and the voting public we conclude with suggestions for how ecological economists can still take advantage of the katrina window and better prepare for future windows opening

environmental bonds and environmental research in innovative activities abstract this paper considers the incentive to uncover potential future social costs of activities having no historical precedents since ex ante markets in the future external effects of historically unique activities are non existent the private incentives to uncover the possibility of thalidomide type results in such activities is weak the paper discusses the value of sequentially determined environmental bonds as mechanisms for the generation of research funds in these cases and derives measures for the calculation of such bonds

an evaluation of excess demand actual cost and normal cost pricing hypotheses using non nested tests this paper has emperically analyzed three versions zero lag geometric lag and almon lag of three price change hypotheses namely the excess demand actual cost and the normal cost hypothesis the goal being to select the hypothesis that describes the underlying price dynamics for manufactured goods the rival models are specified as non nested alternatives and each version is estimated by using an efficient estimator the traditional discrimination criteria which clearly reject the zero lag version are found to be impotent in discriminating between the dynamic versions of the models a sequential cross evaluation of the two dynamic versions using both pairwise and multiple non nested hypothesis tests proposed by davidson and mackinnon reveals a systematic domination by the almon version of normal cost pricing over both the excess demand and the actual cost pricing mechanisms in the canadian manufacturing sector during the period 1961 1 87 4 this result is robust under alternative specifications of th

ecological economics and scientific controversies lessons from some recent policy making in the eec abstract contrasting the very limited scientific evidence on the forest dieback issue with the sudden adoption of policies on air pollution decided in the frg 1983 1984 and extended to the european community 1985 we propose an interpretative framework for the real internalization process at work in what was tantamount to a social crisis for public opinion the media and political actors we conclude that open scientific controversies on some environmental issues effects causes solutions pave the way for some actors to use the issue for their own techno industrial strategies quite alien to ecological constraints in cases of very high uncertainties on impacts it becomes impossible to apply conventional social cost benefit analysis scba as an optimizing tool we propose to develop economic analysis as a negotiation language and to give pride of place to the value of learning time and to the crucial role of technological pluralism as a condition for flexibility in the future

network effects aftermarkets and the coase conjecture a dynamic markovian approach this paper investigates the expansion of the network of a monopolist firm that produces a durable good and is also involved in the corresponding aftermarket we characterize the markov perfect equilibrium of the continuous time dynamic game played by the monopolist and the forward looking consumers under the assumption that consumers benefit from the subsequent expansion of the network the paper contributes to the theoretical discussion on the validity of the coase conjecture analyzing whether coase s prediction that the monopolist serves the market in a twinkling of an eye remains valid in our setup we conclude that the equilibrium network development may actually be gradual contradicting coase s conjecture we find that a necessary condition for such a result is the existence of aftermarket network effects that accrue at least partly to the monopolist firm

a note on expanding networks and monopoly pricing we obtain explicitly the optimal path of prices for a monopolist operating in a network industry during a finite number of periods we describe this optimal path as a function of network intensity and horizon length and show that the prices are increasing in time and that for very low network intensity or very high horizon length the monopolist will offer the good at zero price in the initial period

monopoly pricing with network externalities abstract how should a monopolist price a durable good or a new technology that is subject to network externalities in particular should the monopolist set a low introductory price to attract a critical mass of adopters in this paper we provide intuition as to when and why introductory pricing might occur in the presence of network externalities incomplete information about demand or asymmetric information about costs is necessary for introductory pricing to occur in equilibrium when consumers are small

ecological economics of coastal disasters introduction to the special issue abstract coastal disasters are increasing in frequency and magnitude measured in terms of human lives lost destroyed infrastructure ecological damage and disrupted social networks hurricane katrina and the indian ocean tsunami illustrate the severe and widespread impacts of such disasters on human well being the proximate cause of most of these disasters is forces of nature however human decisions driven largely by economic forces do much to aggravate these natural disasters for example coastal mangroves and wetlands protect coastal communities from wave surges and winds but are rapidly being converted for the production of market goods and anthropogenic climate change driven by the energy use of our economy may exacerbate coastal disasters in several ways the goal of economics should be to improve the sustainable well being of humans our well being is generated in part by the production of market goods and services but also by the goods and services provided by nature by social networks and norms by knowledge and health in short built natural social and human capital respectively in seeking to increase human well being solely by maximizing the monetary value of market goods built capital our current economic system may be doing more to undermine our sustainable well being than to improve it a point made clear by the growing negative impacts of coastal disasters an economic system should allocate available resources in a way that equitably and efficiently provides for the sustainable well being of people by protecting and investing in all four types of capital this is what ecological economics seeks to do this article introduces ten papers that apply the four capital framework to the analysis of coastal disasters seeking to understand their impacts and how to mitigate them how to predict and plan for them and how to use this information to redesign coastal areas in a more sustainable and desirable way

externality or sustainability economics abstract in an effort to develop sustainability economics baumgartner and quaas 2010 neglect the central concept of environmental economics environmental externality this note proposes a possible connection between the concepts of environmental externality and sustainability in addition attention is asked for other aspects of sustainability economics namely the distinction weak strong sustainability spatial sustainability and sustainable trade distinctive sustainability policy and the ideas of early sustainability economists i argue that both sustainability and externalities reflect a systems perspective and propose that effective sustainability solutions require that more attention is given to system feedbacks notably other regarding preferences and social interactions and energy and environmental rebound the case of climate change and policy is used to illustrate particular statements as a conclusion a list of 20 insights and suggestions for research is offered

dynamic competition and price adjustments the link between price rigidity and market structure has long been a topic of interest to researchers in both macroeconomics and industrial organization research on this subject with its antecedents in the widely debated topic of administered inflation has gone through several stages in recent years the focus of research has been on explaining the speed of price adjustment 8 7 11 4 2 3 a parallel line of research has been on the role of entry in disciplining the price behavior of incumbent firms 15 14 5 the current study extends previous work on price adjustment in several important ways most importantly we introduce dynamic elements of competition as measured by several disaggregated measures of domestic and import entry we are able to evaluate the extent to which price effects of entry into u s manufacturing are due to changes in desired prices or to changes in the speed of adjustment to desired prices we depart from previous studies in that we use pooled data to estimate by nonlinear regression methods both the desired target price change and the speed of adjustment across industries

causes of increased competition in the u s economy 1939 1980 examines the sources of increased competition in the united states u s between 1939 to 1980 in this paper authors consider the review of related literature trends and patterns of competitive structure in the u s economy influence of antirust actions on competition

environmental and land use regulation in nonrenewable resource industries implications from the wyoming checkerboard this paper examines how the oil and soning that these effects should be similar gas industry responds to changes in environmental to those of production and property taxes and land use regulations pertaining to drilling by like stollery however they do not conexamining differences in regulatory practices on sider the situation where environmental federal and private land a simulation model for regulations directly affect explo ration and wyoming is used to estimate losses of oil and gas development output over the next 60 years because of higher activities in any case the drilling costs found on federal property the pres limited number of studies in this area and ent value of these losses comes to about 800 mil their narrow scope is surprising in light of lion a lso this case study is of interest because it the importance of environmental complishows that future production is more sensitive to ance costs to firms that produce from nonchanges in environmental regulations that apply to renewable resources and because of the drilling than to changes in severance taxes levied observation by jaffe et al 1995 that a on production

the case for methodological pluralism abstract ecology and economics share the same greek root both address complex systems ecology consists of numerous approaches to understanding natural systems energetics population biology food web models hierarchy theory to mention just a few within ecology field knowledge and the reporting of new observations are well respected economics on the other hand is dominated by one pattern of thinking and standard of proof the market model and econometrics within economics field knowledge and observations per se are little valued agreement on a correct method is frequently taken as an indication of the maturity of a science the argument is developed in this paper that all the aspects of complex systems can only be understood through multiple methodologies the agreement on method within economics however seems to reflect stronger pressures within the discipline for conformity than for truth relative to ecology since ecological economics seeks to understand a larger system than either economics or ecology seeks to understand a diversity of methodologies is appropriate and pressures to eliminate methodologies for the sake of conformity should be avoided

economy and environment a theoretical essay on the interdependence of economic and environmental systems preface notation guide 1 introduction part i the physical economy environment system 2 closed physical systems a model 3 structure and time in the physical system 4 technological change and the environmental constraints to physical growth part ii the economic system 5 the price system 6 prices property and the environment 7 economic conflict and environmental change part iii environmental strategies in an evolutionary economy environment system 8 time uncertainty and external effects 9 the market solution 10 the stationary state 11 conclusions references index

regulatory schemes and self protective environmental risk control a comparison of insurance liability and deposit refund systems abstract there has been an increasing interest in considering non traditional regulatory instruments for control of environmental risks traditional regulation has relied on liability in various forms after risky events have actually occurred there is concern that traditional instruments do not provide adequate signals to firms regarding social costs of risks this paper considers two important alternatives to traditional liability instruments insurance and deposit refund systems the purpose of the paper is to determine whether there is any theoretical superiority of these non traditional instruments in controlling environmental risk and safety a relatively simple model designed to capture the essential features of liability insurance and deposit refund instruments is developed and used to compare the resulting control levels under pure risk and pure uncertainty the paper shows how risk aversion limited liability afforded through bankruptcy and differences between social and private discount rates can affect the ranking of control levels under each of the three primary instruments the paper shows that under reasonable assumptions deposit refund systems such as input or discharge deposits or performance bonds will result in higher levels of controls than the other instruments results also suggest that it may be necessary to tailor regulatory instruments to specific firm situations such as requiring deposits from small firms in competitive industries

the limited political influence of ecological economics a case study on dutch environmental policies abstract although the ecological economics ee discourse attempts to influence environmental policy empirical studies have concluded that its success in this endeavour has been limited thus far in the netherlands however two ee related policy concepts environmental utilisation space and ecological footprint were strongly present in environmental policy during certain periods in time but subsequently disappeared from the environmental agenda the central question of this article is how these ups and downs of the ee concepts can be understood which factors determine their rise on and fall from the policy agenda over time to answer this question this article offers a conceptual model informed by the approaches in political science on framing agenda setting and knowledge utilisation we conclude that the interplay of concept specific characteristics the formation of coalitions around the concept and contextual variables explain the rise and fall of the aforementioned concepts a match between the dominant policy frame and the core elements of the concept provides the opportunity for the two concepts to be pushed on the agenda we observe the alternation of constraining frames which allows for ee concepts to survive and reconciling frames which block agenda entrance for ee concepts furthermore the alternation of these frames seems to correlate with economic and public environmental attention cycles in the netherlands

conservation of mass and instability in a dynamic economy environment system abstract this paper considers a variant of the neumann leontief sraffa general equilibrium models in the context of a jointly determined economy environment system subject to a conversation of mass condition it shows that the conservation of mass contradicts the free disposal free gifts and non innovation assumptions of such models that an expanding economy will be associated with continuous disequilibrating change in the material transformations of both economy and environment and that this change is uncontrollable through the price system

choices without prices without apologies valuing is usually regarded as a process of compressing information about attributes into a single metric armed with this reduced form of compact information the consumer can consider a particular object with a particular price attached or implied and make an informed decision but the process of valuing is less straightforward than we ordinarily suppose when environmental goods and services become the object of information compaction it is possible that important information is lost we comment on the choice problem germane to environmental goods and services and challenge the presumption that environmental choices made without explicit pricing are inferior to those in which hypothetical valuation studies are undertaken

a note on dynamic monopoly pricing under consumption externalities we analyze dynamic monopoly pricing under consumption externalities focusing on pricing under negative externalities we also attempt to generalize models in the previous literature which encompass both negative and positive externalities by incorporating a consumer s discount factor for past sales as a parameter analyzing our model reveals oscillation as the optimal price path in the presence of negative externalities

price transmission and local market power empirical evidence from the austrian gasoline market we analyse the impact of local market power on price margins and different dimensions of price adjustment dynamics speed and asymmetry of price transmission using data for a large number of indiv

behavior of the firm under regulatory constraint a recent article by akira takayama discusses an earlier paper by harvey averch and leland l johnson on fair rate of return regulation of public utilities although takayama p 255 agrees with averch and johnson s general conclusions that a firm will tend to increase its investment with the introduction of an active constraint on its rate of return he criticizes the a j argument as being confusing ambiguous and in error takayama then attempts a clarification and presents a new formulation which leads to the a j result quoted above this comment will discuss several of takayama s criticisms in addition to showing that the so called a j effect cannot be derived from the basic assumptions made by both averch and johnson and takayama 1 we will show that the very assumptions used to prove the a j effect by defining the region of x require an assumption that the a j effect exists in the first place

the value of biodiversity markets society and ecosystems the value of biodiversity is discussed at different levels including market value non market values to humans and the value of biodi versity to ecosystems the main conclusion is that although market exchange values of environmental services may be used to justify biodiversity protec tion measures it must be stressed that exchange value constitutes a small portion of total biodiver sity value the total value of existing biodiversity is largely unknown but indications are that it is essen tial to human existence the various levels of biodi versity value point to the need for a hierarchical and pluralistic methodology to determine appropri ate policies for its preservation jel q21 i introduction among ecologists there is a general con sensus that biodiversity1 is of critical impor tance to the health of ecosystems and even for the long term survival of the human species there is also a consensus that bio diversity is being lost at a rate which is a cause for concern 2 economists on the other hand generally view biodiversity as just an other good which is to be placed in the basket of market choices just as any other the discussion of the specifics of biodiver sity policy has been unsatisfactory partly because of the different meanings of the word value used by economists and ecolo gists many ecologists fail to understand the logic of market allocation and why biologi cal resources are used in seemingly irra tional ways many economists fail to ap preciate the narrowness of the concept of economic value as indicated by relative prices determined by market exchange fol lowing anderson 1966 and brown 1984 the discussion below considers economic measures of value to be species of the genus assigned value which belongs to the family value many biologists and paleontologists be lieve that we are at a critical point in the history of the human species and perhaps even in the 600 million year history of com plex multicelled life on earth if the paleon tologists and biologists who study the phe nomenon of mass extinction are correct the current human induced mass extinction may be of the same order of magnitude as the five other major extinction episodes which destroyed between 20 and 96 percent of existing species on the planet ehrlich and ehrlich 1992 ward 1994 wilson 1992 we are living in a truly remarkable period in earth s 41 billion year history the valua tion decisions our species has made in the recent past and will make during the next few decades will determine the fate of life on earth for the next tens of millions of years it is critical to clarify the language and concepts we use to estimate the value of biodiversity and thus policies leading to its destruction or preservation the importance attached to the issue of biodiversity preservation necessarily in volves ethical judgments about duty to fu ture generations and responsibility toward the nonhuman natural world although in dividuals hold a variety of conflicting beliefs about human responsibility to the natural world this does not mean that policy choices

an experimental analysis of the effectiveness of an environmental assurance bonding system on player behavior in a simulated firm it has long been recognized that the present command and control methods for pollution abatement are inefficient using market mechanisms for environmental management is a promising alternative to the direct regulatory approach market mechanisms are just beginning to appear in u s environmental policy for example tradable permit schemes are being developed and implemented for some air pollutants under the amended clean air act various other forms of taxes and tradable permits have been proposed however these systems do not address the large uncertainty inherent in most environmental problems one mechanism currently being studied to address uncertainty more effectively is a flexible environmental assurance bonding system designed to incorporate environmental criteria and uncertainty into market incentives this study uses an experimental approach employing an interactive computer game simulation model with human players to examine the effectiveness of the assurance bonding system under varying degrees of uncertainty an environmental cost efficiency index ecei or profit per unit waste is used to measure player performance preliminary results indicate that players are more successful under the assurance bonding system in terms of ecei than under the simulated current system

a model of industrial pollution in a stochastic environment abstract standard models of pollution abatement assume that pollution accumulation occurs in a deterministic pattern as a by product of the production process governmental intervention often occurs in the form of taxation or mandatory abatement controls to reduce inefficiency caused by incomplete markets in this paper we assume that the accumulation effect of pollution may be stochastic due for instance to the random absorption capacity of the ecosystem furthermore we assume that the level of pollution may vary with input use as well as output level we proceed to analyze properties of a policy for efficient social management of competitive firms which generate pollution

taxes subsidies and insurance as drivers of united states coastal development abstract ever increasing coastal populations in the united states and worldwide are putting growing quantities of people and property at risk due to coastal disasters at the same time poorly planned development policies and practices erode the natural capital of coastal regions eliminating existing landscape protection from intense wind and waves government tax subsidy and insurance policies can encourage or discourage particular forms of development in the u s there is no consistent set of incentives or disincentives for coastal development and many programs have ambiguous or contradictory goals federal programs are highly fragmented being administered by a variety of government agencies state and local governments can also implement policies to improve coastal disaster protection but often fail to do so in other cases state and local policies designed for local economic growth work against the goals of federal policy increasing flood damage risk while relying on federal aid once disaster does strike these programs frequently lead to perverse subsidies where economically inefficient policies degrade natural capital and foster economic inequality in this study we evaluate the existing tax subsidy and insurance structures that led to coastal development patterns on the u s gulf coast over the last sixty years and propose alternative policies that could create a more sustainable just economically efficient and storm adaptive region

intertemporal valuation in an unpredictable environment abstract the inherent unpredictability of ecological systems is a vital feature for the development of theories at the interface between economics and ecology such unpredictability is caused by instabilities that are intrinsic parts of ecosystem function succession and evolution the complexity of ecological dynamics undermines the simple probabilistic treatment of uncertainty based on the equilibrium paradigm common in traditional environmental economics we investigate an important alternative by representing the dynamics of the biogeophysical system as an infinite sequence of instabilities this leads to a stochastic process exhibiting an exponentially growing variance our analysis is carried out in a macroeconomic setting in a situation where the value system here formalized in terms of risk averse social welfare functions contains at least two distinct aspects consumption rate and the state of the environment the central variables for intertemporal valuation i e the time dependent expected values of the two welfare function components are calculated using the probability distribution describing the environmental dynamics one result is that if the unpredictability of the environmental dynamics is taken into account then the social discount rate for environmental existence values may well be negative

rent seeking with pollution taxation an extension in a recent issue of this journal dwight lee analyzes pollution taxation in a rent seeking environment the purpose of this paper is to extend lee s basic framework to a second best environment in doing so it will be shown that a pigovian tax may be the preferred rate even if rent seeking costs are included the paper is organized as follows in section ii we present a slightly modified version of lee s analysis of the optimal pollution tax in a rent seeking environment having done so it is shown that lee s specification of the optimal pollution tax must be modified in a second best environment some general results that emerge from our analysis are summarized in a proposition in section iii we offer some concluding remarks from authors

industrial structure concentration and the speed of price adjustment it is argued that the relationship between market structure and the speed of price adjustment involves two distinct forces with opposing directions t he leadership effect and the industry profitability effect the direction of the relationship will depend on the relative importance of these effects estimation of an equation explaining the speed of price adjustment in terms of industrial concentration and the length of the production period provided evidence of negative effects for bo th the above variables copyright 1988 by blackwell publishing ltd

dynamic monopoly pricing with network externalities abstract in this paper we study the optimal dynamic monopoly pricing for a good which exhibits positive network externalities when network externalities are of sufficient magnitude we show that contrary to the coase theorem 1 there is no time inconsistency problem 2 subgame perfect equilibrium prices increase as time passes from this point of view positive network externalities allow the monopoly to commit itself credibly to increasing future prices ce papier etudie la tarification optimale intertemporelle d un monopole qui vend un bien exhibant des externalites positives de reseau lorsque ces externalites sont suffisamment importantes nous montrons que contrairement au theoreme de coase 1 il n y a pas de probleme d incoherence temporelle 2 les prix d equilibre parfait croissent avec le temps de ce point de vue les externalites positives de reseau permettent au monopole de s engager crediblement sur une politique de prix futurs a la hausse

energy vs the environment optimal development programs that explicitly account for the environmental impacts of extracting and consuming energy resources are analyzed following lee and orr 1975 we allow for the possibility of storing the resource above ground once it has been extracted when environmental disruption results from resource extraction as in the case of strip mining or there are environmental costs associated with resource consumption for example the social costs of air pollution from fuel consumption then the socially optimal rates of resource consumption and extraction depend on the severity of the environmental impact and on the prospects of storing the resource above ground

self reporting of pollution and the firm s behavior under imperfectly enforceable regulations abstract motivated by the nature of u s laws a model is developed for a firm that maximizes expected profit and faces imperfectly enforceable pollution standards with imperfectly enforceable reporting requirements some previous models of imperfectly enforceable standards and taxes are special cases of this general mode when the fine for violating the pollution standard is linear in excess pollution the form will equate the marginal cost of control to the marginal fine rate and thus actual pollution will be insensitive to enforcement parameters related to under reporting the more complex comparative statics that exist when the fine is non linear are analyzed and comparisons with other models are made

the empirical properties of two classes of designs for transferable discharge permit markets abstract previous work by atkinson and lewis j environ econ manag 1 237 250 1974 and anderson et al an analysis of alternative policies for attaining and maintaining a short term no2 standard mathtech inc princeton n j 1979 has indicated the tremendous cost advantages to be achieved by moving from a policy based on emission standards to one based on marketable emission permits as tietenberg land econ 56 391 416 1980 points out however neither of the major permit designs treated in the literature are optimal from all points of view this has triggered a search for alternative permit designs which while they may not minimize compliance costs have sufficient other virtues as to make them attractive on other grounds the purpose of this paper is to examine within the context of an empirical mathematical programming model the air quality emission and cost consequences of two classes of the permit designs which can be implemented in the absence of information on control costs this case study involves particulate control in st louis

dynamic nonlinear pricing in networks with interdependent demand we consider the pricing decision for a new product whose consumption value increases as the network of adopters expands this demand interdependence is a characteristic feature of telecommunications networks the paper analyzes the case of a single supplier offering the product to a heterogeneous population consumers decide on network access and consumption quantity the pricing decision consists of choosing a pricing schedule over the dimensions of quantity and time that maximizes the present value of a weighted sum of total surplus and producer profits subject to the dynamics of market growth we find that the decision can be decoupled into two nested optimization problems a given some market size what should the optimal nonlinear price schedule be and b how should the price schedule be changed optimally over time this separation enables us to solve the pricing problem explicit consideration of the dynamics the discounting of future surpluses and the extent of market growth anticipation affect not only the price and network size trajectories but also their steady state equilibrium values

environmental impairment liability as an instrument of environmental policy abstract this paper evaluates the role of liability that may arise in the context of an impairment of the environment environmental impairment liability or eil for short is analyzed as an instrument of environmental policy interrelationships between injurers victims the legal system insurers and the environment serve to show that eil may contribute to preserve the environment however peculiarities such as mass torts and uncertain behavior of courts serve to detract from the effectiveness of eil the question arises of whether these shortcomings are 1 mitigated or exacerbated by eil insurance the potential contribution of insurance to eil is found to be undermined by partial market failure which however can be alleviated by permitting the flotation of environmental risk warrants on capital markets

multi period pricing in the presence of competition and social influence abstract this paper examines single and dynamic pricing policies of two competing firms over two periods in the presence of social influence assuming two firms adopt the same pricing policy we find that under either pricing policy firm profits always decrease with the degree of social influence firms prefer dynamic pricing policy when social influence is either relatively weak or sufficiently strong for firms under dynamic pricing policy to set zero prices in the first period otherwise single pricing policy is more preferable the conclusions are similar when the market size varies over periods except that dynamic pricing policy is always more profitable if the market size in period 2 is sufficiently large we have further compared the two pricing policies with posted pricing policy the results show that dynamic pricing policy dominates when social influence is relatively weak while posted pricing policy dominates when social influence is sufficiently strong because of the synergy between social influence and the reference price effect finally when each firm freely chooses either single or dynamic pricing policy we find that if the degree of social influence is relatively small two asymmetric equilibria exist where two firms adopt different pricing policies if the degree of social influence is very large however the unique equilibrium is both firms adopting dynamic pricing policy these findings provide important implications for firms to make more informed pricing decisions in an increasingly competitive environment with strong social influence

a flexible assurance bonding system for improved environmental management abstract current methods of regulating activities that are known or suspected to be environmentally danaging are not working well they induce legal confrontation obfuscation and government intrusion into the inner workings of firms they tend to suppress technical and social innovation aimed at long term solutions they do not mesh well with the market signals that firms use to make decisions this paper discusses some of the underlying reasons for this problem and outlines a flexible environmental assurance bonding system designed to incorporate environmental criteria and uncertainty into the market system and to induce positive environmental technological innovation in addition to direct charges for known environmental damages an assurance bond equal to the current best estimate of the largest potential future environmental damages would be levied and kept in an interest bearing escrow account the bond plus a portion of the interest would be returned if and only if the firm could prove that the suspected damages had not occured or would not occur if damages did occur the bond would be used to rehabilitate or repair the environment and to compensate injured parties by requiring the users of environmental resources to post a bond adequate to cover potential future environmental damages with the possibility for refunds the burden of proof is shifted from the public to the resource user and a strong economic incentive is provided to research the true costs of environmentally innovative activities and to develop innovative cost effective pollution control technologies

uncertainty and pollution the role of indirect taxation abstract this paper explores the potential usefulness of indirect taxation as a supplement to effluent charges it is argued that effluent charges should typically be accompanied by taxes on privately traded commodities linked to the pollutant in consumption or production the performance of such combinations of taxes and charges is then compared to that of an effluent standard

price dynamics in uk manufacturing a microeconomic view this paper examines the response of prices to cost and demand shocks in seventy five three digit and four digit industries in the united kingdom during the 1980s the results suggest that prices responded sluggishly to costs but virtually not at all to demand the short run response to materials and fuel shocks was much larger than the response to unit labor cost shocks and some of this difference persisted into the long run prices responded more sluggishly to cost and demand shocks when aggregate inflation was lower and finally pricing dynamics were more sluggish in less competitive industries copyright 1992 by the london school of economics and political science

international trade secondary output and concentration in canadian manufacturing industries 1979 census concentration measures do not account for either secondary output or imports taking these into account for canada in 1979 shows that measured concentration substantially overstates the degree to which a small number of firms controls a large proportion of industry output correcting for imports has a much greater effect than correcting for secondary output these results are much more apparent in national than regional industries on the other hand taking into account exports has virtually no effect on estimates of concentration these findings strengthen as well as throw additional light on earlier work for the uk and canada which made ad hoc corrections to census concentration measures

network effects market structure and industry performance abstract this paper analyzes oligopolistic markets with network externalities exploiting a minimal complementarity structure on the model primitives that allows for pure network goods we prove existence of non trivial fulfilled expectations equilibrium we formalize the concept of industry viability investigate its determinants and show that it improves with more firms in the market and or by technological progress these results enlighten some well known conclusions from case studies in the management strategy literature we also characterize the effects of market structure on industry performance which depart substantially from ordinary markets the approach relies on lattice theoretic methods supplemented with basic insights from nonsmooth analysis

limits to environmental bonds abstract bonds have recently been promoted as an alternative tool to control environmental damages particularly in those instances when the innovative activities of a firm have uncertain future impacts under this mechanism a firm would post a bond ex ante forfeiting all or a portion of the bond if its activities harmed environmental resources while the benefits of bonds have been developed there has been little systematic effort to explore their limitations in contrast the labor literature has extensively studied the limits of bonds as a mechanism to prevent worker shirking using insights from this parallel problem this paper explores the limits to environmental bonds focusing on the problems of moral hazard liquidity constraints and legal restrictions each limit offers a challenge to the success of environmental bonds we explore the use of bonds in surface mining and agricultural nonpoint pollution as motivating examples we also consider how other incentive schemes suggested by the labor literature might prove useful in the context of environmental management we consider the labor mechanisms of efficiency wages increasing wage profiles trust funds and rank order tournaments

efficiency and applicability of economic concepts dealing with environmental risk and ignorance abstract the paper examines the efficiency and applicability of various economic concepts dealing with environmental uncertainty their applicability is analysed by classifying environmental uncertainty according to different criteria using such a structure it can be shown that while the economic concepts are able to deal satisfactorily with some types of environmental uncertainty they are unable to deal with others adequately the analysis of efficiency distinguishes between environmental risk in which the decision maker is aware of the distribution function of the random variables and ignorance in which the decision maker does not know the relevant distribution functions the concept of a risk premium proposed by siebert the policy recommendation to promote integrated technologies and the environmental assurance bonding system developed by costanza and perrings are examined in terms of efficiency and applicability the analysis reveals the following i the application possibilities of the three concepts differ significantly ii a concept which concentrates on the reduction of risk may lead to an increase in ignorance iii while an economic concept may be efficient in the context of risk it can be inefficient when ignorance exists iv a trade off exists between the possibility to precisely state whether an economic concept is efficient and the scope of its applicability

dynamic model for market competition and price rigidity abstractthis article presents a price floor model in which durability unit costs and production period are factors in explaining price rigidity this article elaborates that cost structure plays an essential role in resolving the inconclusive relationship between market concentration and price rigidity when the industry is characterized by decreasing returns of scale the degree of price flexibility decreases as market competition intensifies the reverse is true when the industry exhibits increasing returns of scale the factors that cause price rigidity also foster price adjustment asymmetry and price adjustment lag during times of recession the model exhibits upward price flexibility as costs increase but downward price rigidity as costs decrease even under forward looking expectations the way in which firms adjust prices could look as though they have adaptive expectations if price stickiness is a characteristic of market competition then public policies determined by price level could be too

collusive price rigidity under price matching punishments by analysing an infinitely repeated game where unit costs alternate stochastically between low and high states and where firms follow a price matching punishment strategy we demonstrate that the best collusive prices are rigid over time when the two cost levels are sufficiently close this provides game theoretic support for the results of the kinked demand curve in contrast to the kinked demand curve it also generates predictions regarding the level and the determinants of the best collusive price which in turn has implications for the corresponding collusive profits the relationships between such price rigidity and the expected duration of a high cost phase the degree of product differentiation and the number of firms in the market are also investigated

dynamic aspects of effluent taxation under uncertainty abstract the optimal adjustment process for an effluent charge is derived when the firm s response to the charge is uncertain the optimal process is shown to exhibit the dual effects of caution and probing because of uncertainty society should be risk averse or cautious when setting the charge however because of the possibility of generating information for improved future control this caution is balanced by the incentive to probe for additional information finally if the uncertain parameters of the firm s response function are nonautonomous their change over time must be explicitly considered to avoid bias in estimation

the law of one price further empirical evidence concerning italy and the united kingdom the main purpose of this paper is to perform a disaggregated test on the empirical validity of the law of one price hypothesis in the sector of manufacturing for two industrial countries italy and the united kingdom during the period 1973 80 the findings show that italian export prices are much less related to british export prices than is usually suggested by contemporary balance of payments and exchange rate theoretical literature assuming the law of one price

discrete modelling of supply response under uncertainty the case of the fishery abstract in the absence of complete control in a regulated industry effective management requires prediction of firms behavioral responses to public policy this paper develops a discrete choice model of supply response under uncertainty and applies it to fishery choice problems of new england fishing firms while fishermen demonstrate a bias towards remaining within the same fishery sufficient incentives in terms of changes in expected returns and risk are shown to elicit response due to extreme uncertainty concerning population dynamics of fish stocks a satisficing approach to management facilitated by this type of modelling may be more appropriate than bioeconomic optimization

the identity of ecological economics retrospects and prospects the paper first reveals the relevance of ecological economics in the time of a triple crisis ecological social and economic and promotes it as a distinct paradigm comprised of two interconnected and interdependent aspects the qualitative framework within which it operates and the quantitative models and techniques it uses to observe ecosystem resilience measure progress towards sustainability and evaluate policies while acknowledging the progress that has so far been made the paper argues that divergences in understanding the meaning and content of ecological economics hinder its effectiveness and influence on real world policy making and calls for a unified framework as a common ground that would strengthen the field and direct research the implication of this position then follows pointing out what has so far been missing from the ecological economics analysis and what should be done for it to become a more problem oriented and policy relevant alternative copyright oxford university press