the greenhouse effect damages costs and abatement the buildup of so called greenhouse gases in the atmosphere co2 in particular appears to be having an adverse impact on the global climate this paper briefly reviews current expectations with regard to physical and biological effects their potential costs to society and likely costs of abatement for a worst case scenario it is impossible to assess in economic terms the full range of possible non linear synergistic effects in the most favorable although not necessarily likely case of slow paced climate change however it seems likely that the impacts are within the affordable range at least in the industrialized countries of the world in the third world the notion of affordability is of doubtful relevance making the problem of quantitative evaluation almost impossible we tentatively assess the lower limit of quantifiable climate induced damages at 30 to 35 per ton of co2 equivalent worldwide with the major damages being concentrated in regions most adversely affected by sea level rise the non quantifiable environmental damages are also significant and should by no means be disregarded the costs and benefits of 1 reducing cfc use and 2 reducing fossil fuel consumption as a means of abatement are considered in some detail this strategy has remarkably high indirect benefits in terms of reduced air pollution damage and even direct cost savings to consumers the indirect benefits of reduced air pollution and its associated health and environmental effects from fossil fuel combustion in the industrialized countries range from 20 to 60 per ton of co2 eliminated in addition there is good evidence that modest e g 25 reductions in co2 emissions may be achievable by the u s and by implication for other countries by a combination of increased energy efficiency and restructuring that would permit simultaneous direct economic benefits savings to energy consumers of the order of 50 per ton of co2 saved a higher level of overall emissions reduction possibly approaching 50 could probably be achieved at little or not net cost by taking advantage of these savings we suggest the use of taxes on fossil fuel extraction or a carbon tax as a reasonable way of inducing the structural changes that would be required to achieve significant reduction in energy use and co2 emissions to minimize the economic burden and create a political constituency in support of the approach we suggest the substitution of resource based taxes in general for other types of taxes on labor income real estate or trade that are now the main sources of government revenue while it is conceded that it would be difficult to calculate the optimal tax on extractive resources we do not think this is a necessary prerequisite to policy making in fact we note that the existing tax system has never been optimized according to theoretical principles and is far from optimal by any reasonable criteria

energy price shocks and medium term business cycles abstract energy price shocks pose sudden challenges to economies this paper examines how oil price shocks have influenced the u s economy over the last decades and especially focuses on the productivity slowdown in the years following an oil price shock we extend the existing literature by considering medium term business cycles which consist of high frequency components conventional business cycles up to 8 years and medium frequency components 8 50 years we find that the medium frequency consequences of energy price shocks are considerable and explain a significant part of the productivity slowdown

the enduring power of coase abstractby many measures ronald coase has been among the most influential economists of the past 60 years why is this so we suggest that coase s work has enduring appeal to and insight for social scientists in part because it addresses the biggest and most important social problems how do we solve governance and coordination problems when limited information common resource issues and public good issues produce conflicts among several people at once any scholar who works on issues of corporate or common pool governance pollution allocation of seats on legislative committees regulation of systemic risk in financial markets provision of military forces patent thickets creation of optimal communications networks regulation of decreasing cost industries or compensation of corporate officers can see his or her work stemming from several of coase s original insights just as john nash s work reshaped economic theory almost every field of economics and political science is shaped by coasean insights

the productivity puzzle abstract the productivity puzzle is the unexplained drop in productivity growth rates that began circa 1970 when standard productivity measures are adjusted for employer incentives for labor hoarding approximately 10 of this drop is explained

the tradeoff of the commons under stochastic use abstract we develop a model of scarce renewable resources to study the problem of the commons our model formulation differs from the existing literature in that it assumes the use of the commons to be stochastic in nature one example is microwave spectrum for mobile and wireless communications we investigate three mechanisms of resource allocation free usage the exclusive franchise and a regulated monopoly we show that the welfare tradeoff among these three mechanisms depends on the characteristics of the commons and their usage patterns in particular we find that property rights are not always the best solution we then make four extensions that apply to spectrum allocations

comparing stochastic price regimes abstract marshallian consumer s surplus can often be defended as a useful approximation to hicksian compensating variation under price uncertainty however expected compensating variation is not a generally valid welfare measure and expected consumer s surplus cannot be justified as an approximation to a rigorous construct

ex ante valuation of atmospheric visibility in a world incomplete markets for environmental goods ex ante planned expenditures rather than ex post realized outcomes explain the values which individuals attach to these goods we use the distance function to develop restrictions from a model of ex ante consumer behaviour involving these goods a contigent valuation approach is then employed to estimate policy relavant components of the ex ante economic values that recreationists attach to differing subjective probabilities of alternative atmospheric visibility levels at a wilderness location and at an urban location in oregon marginal valuations of probability changes are similar at the two sites marginal rates of time preference for resolving uncertainities vary between 10 and 50 and are inversely related to education existence value averages 10 of total value and evidence is mixed that site specific value act as surrogates for general environmental preferences

bounds on elasticities with optimization frictions a synthesis of micro and macro evidence on labor supply how can price elasticities be identified when agents face optimization frictions such as adjustment costs or inattention i derive bounds on structural price elasticities that are a function of the observed effect of a price change on demand the size of the price change and the degree of frictions the degree of frictions is measured by the utility losses agents tolerate to deviate from the frictionless optimum the bounds imply that frictions affect intensive margin elasticities much more than extensive margin elasticities i apply these bounds to the literature on labor supply the utility costs of ignoring the tax changes used to identify intensive margin labor supply elasticities are typically less than 1 of earnings as a result small frictions can explain the differences between micro and macro elasticities extensive and intensive margin elasticities and other disparate findings pooling estimates from existing studies i estimate a hicksian labor supply elasticity of 0 33 on the intensive margin and 0 25 on the extensive margin after accounting for frictions

errors in the numerical assessment of the benefits of price stabilization this paper presents a simple computational procedure for determining a consumer s willingness to pay to have a price stabilization policy implemented numerical simulations are then provided which demonstrate that the commonly used expected surplus measures whether hicksian or marshallian can in fact seriously misstate the true benefits of price stabilization these simulations also illustrate the extent to which the results may be dependent upon the assumptions made implicitly or explicitly regarding the consumer s attitudes toward risk thereby underscoring the need to conduct sensitivity analyses to determine the robustness of cost benefit assessments with respect to these assumptions

measuring economic welfare is theory a cookbook for empirical analysis welfare economics is first and foremost a policy science in his classic treatise a k sen says welfare economics is concerned with policy recommendations gunnar myrdal in discussing the economist and the politician proposes that the politician may reasonably expect from the economist that he should explain the actual situation and state the effects of different modes of action in relation to the same initial situation empirical welfare economics should provide guidance to policy makers in evaluating actual policies in real markets using available data and reasonable methods real markets are characterized by multimarket spillovers dynamic responses to economic policy uncertainty and incomplete market structures while theoretical models

testing the implications of the olson hypothesis considerable attention has been paid to the hypothesis advanced by olson that accumulations of interest groups build up over time and retard economic performance most previous tests of this hypothesis have been based on comparisons of growth rates in this paper it is argued that comparisons of income levels yield a superior test strong forms of the olson hypothesis in which shocks such as revolution and war yield positive benefits are rejected using this test

recovering preferences from preferences over nominal gambles abstract the main result in revealed preference theory is that under fairly weak assumptions strict concavity and monotonicity of the utility function an agent s preferences can be recovered from the entire demand function this paper addresses the possibility of recovering preferences from less extensive information given additional maintained restrictions on preferences specifically we explore whether an agent s utility function can be recovered from preferences over nominal gambles when money is risky in real terms or from demand for assets whose nominal returns contain common inflation or other risk the recovery is constructive to the extent that there is a good numerical technique for doing fourier transforms and inversions and other numerical computations can be done

the recent slowdown of productivity growth the slowdown of productivity growth in the developed countries during the seventies will in this paper be viewed as a combined effect of three closely interacting forces i a long term deterioration in the efficiency and flexibility of some basic mechanisms of the economic and political systems of these countries ii the fading away of a number of uniquely favourable circumstances for productivity growth during the fifties and sixties and iii the exposure of these economies to unusually severe macroeconomic disturbances in the seventies careful inspection of time series with attempted modifications for cyclical factors suggests that there was hardly any general slowdown of productivity growth among developed countries before approximately i972 4 1 as we know the situation is radically different since then labour productivity growth per year for the entire national economy gdp per man hour seems to have fallen between the periods i960 73 and i973 9 by about i 2 percentage points in the united states 45 by about 24 percentage points in western europe2 45 and by about 5 9 percentage points in japan 6o table i see also fig i the slowdown was of about the same size in the business and manufacturing sectors see table i to calculate the extent of the slowdown of total factor productivity growth is of course a much more hazardous matter to which i will return later if just the various system changes and the fading away of the uniquely favourable factors had been the dominating forces behind the productivity growth slowdown we would expect the slowdown to have been gradual rather than abrupt as it turned out to be this abruptness as well as its timing makes the dramatic macroeconomic disturbances around i972 4 a prime suspect when looking for the villain behind the productivity growth slowdown indeed it is a basic hypothesis of the paper that these macroeconomic disturbances were not only by themselves strongly unfavourable for productivity growth but that they also revealed and accentuated the gradual deterioration of the

intra day arbitrage opportunities in foreign exchange and eurocurrency markets we have two primary objectives in this study first we examine the frequency of attaining simultaneous equilibrium on spot and forward foreign exchange markets and on domestic and foreign securities markets second we measure the profitability of covered interest arbitrage and one way arbitrage our empirical analysis has been conducted using real time quotations the empirical results indicate that a the markets are efficient in the sense that profit opportunities from traditional covered interest arbitrage are rarely available and b the frequency of attaining simultaneous market equilibrium is surprisingly low thus opening the door for one way arbitrage the role of transaction costs in explaining the deviation of the actual forward price from the interest parity forward price has been studied extensively based on covered interest arbitrage frenkel and levich 1975 1977 have shown that the interest parity line is bound by a neutral band defined as

rent seeking distributional coalitions taxes relative prices and economic growth the results clearly indicate that much of the considerable variation in the pace and pattern of economic growth between the various american states is explainable by institutional arrangements amenable to revisions through public policy the findings suggest that long run economic growth would be best served by constraining distributional coalitions be it through constitutional restraints e g balanced budget amendments the item veto statutory changes e g subjecting coalitions like labor unions to the antitrust laws or some other means e g labor and capital fleeing distributional coalitions such as in the movement of workers and plants to nonunion areas

welfare measures when agents can learn a unifying theory we extend graham s 1981 welfare analysis under uncertainty to a dynamic environment where the agent can delay and obtain information the dynamic willingness to pay locus unifies the concepts of option price dynamic wtp commitment costs and quasi option value option price dynamic wtp corresponds to the ex ante wtp when the agent ignores recognises the learning opportunity the commitment cost or the difference between option price and dynamic wtp equals the annualised and monetised quasi option value state contingent contracts have added value by allowing trading among agents with heterogeneous access to future information and delay opportunities

efficient relocation of spectrum incumbents changes in technologies and in consumer demands have made prior radio spectrum allocations far from efficient to address this problem the fcc has recently reallocated spectrum for more flexible use in bands that are partially occupied by incumbent license holders often it is necessary for the new license holder to relocate incumbents to make efficient use of the spectrum regulations structuring the negotiation between incumbent and new entrant can promote efficiency in particular giving the new entrant the right to move the incumbent with compensation can reduce negotiation costs and promote efficiency when there is private information about spectrum values but good public information about the cost of relocating the incumbent we examine the experience of broadband pcs entrants in relocating microwave incumbents we conclude with some remarks on how these ideas might be applied to digital television spectrum

exact consumer s surplus and deadweight loss consumer s surplus is a widely used tool in applied welfare economics both economic theorists and cost benefit analysis often use consumer s surplus despite its somewhat dubious reputation the basic idea is to evaluate the value to a consumer or his willingness to pay for a change in price of a good from say pricep to pricep because price changes affect consumer welfare an evaluation of this effect is often a key input to public policy decisions yet consumer s surplus is probably the most controversial of widely used economic concepts both paul samuelson and ian little conclude that the economics profession would be better off without it it is my feeling of the situation that substantial agreement exists on the correct quantities to be measured the amount the consumer would pay or would need to be paid to be just as well off after the price change as he was before the price change the quantities correspond to john hicks compensating variation measures an alternative measure which takes ex post price change utility as the basis of comparison is hicks equivalent variation the controversy arises in the measurement of these quantities the usual measurement procedure is to use the area to the left of the marshallian market demand curve between two price levels jules dupuit originated this measure of welfare change and alfred marshall and hicks derived appropriate conditions for its use the primary condition for the area to the left of the demand curve to correspond to the compensating variation is to have constant marginal utility of income marshall gave this condition and if it holds the same quantity will be derived as the area to the left of the compensated hicksian demand curve this area to the left of the compensated demand curve is exactly what the compensating variation and equivalent variation measure thus the constant marginal utility of income is a sufficient condition for marshallian consumer s surplus to be equal to hicks consumer s surplus in this case arnold harberger s plea to use the welfare triangle as one half times the product of the price change times the quantity change to measure deadweight loss corresponds to the correct theoretical amount of welfare change in a recent paper robert willig derives bounds for the percentage difference between the correct measure of either the compensating or equivalent variation and the marshallian measure derived form the market demand curve his bounds which depend on the income elasticity of demand for the single good in the region of price change being considered as well as the proportion of the consumer s income spent on the good demonstrate that the marshallian consumer s surplus is often a good approximation to hicks consumer s surplus the fact that the proportion of the consumer s income spent matters as well as the income elasticity was first pointed out by harold hotelling willig contends that the approximation error will be less than the errors involved in estimating the demand curve thus he hopes to remove the need for apology that applied economists often need to give to theorists who remark on the inappropriateness of using marshallian consumer s surplus to measure welfare change however in this paper i show that for the case primarily considered by willig of a single price change which is also the situation in which consumer s surplus is often used in applied work no approximation is necessary professor of economics massachusetts institute of technology and research associate national bureau of economic research i would like to thank peter diamond erwin diewert daniel mcfadden robert merton robert solow hal varian joel yellin and the referees for help and comments research support from the national science foundation is acknowledged the reason that we still have two rather than one of samuelson s six measures of consumer s surplus arises from an index number problem of the correct basis for the welfare comparison i will give both measures but plan to concentrate on the compensating variation

compensating variation consumer s surplus and welfare the compensating variation was defined by j r hicks 1942 as the amount one would have to deduct from a person s income to make him just as well off after a change in prices and income as he had been in the initial situation if the compensating variation is positive the individual is better off under the new situation since the compensating variation furnishes a uniquely defined numerical cardinal indicator of welfare improvement it provides an implicit ranking of alternative prospective situations not only relative to the initial situation but also relative to each other in practice this appears to be how this and other tools of cost benefit analysis are actually used one is interested in knowing not only whether a particular bridge or a particular excise tax will lead to an improvement in welfare but which out of a set of alternative bridges or alternative tax systems will improve welfare the most 1 in this paper we analyze conditions under which the compensating variation can be validly used in this generalized sense these turn out to be precisely the same as conditions previously derived see our 1976 paper for the valid use of consumer s surplus as a welfare measure in our final section we analyze the problem of deriving the generalized equivalent and compensating variations either exactly or approximately from observable demand functions by means of generalizations of or alternatives to consumer s surplus

the optimal subsidization of baptists by bootleggers rent seeking bootleggers have an incentive to subsidize the lobbying activities of the public interest minded baptists we demonstrate that unless a certain set of conditions hold the optimal subsidy will be positive and will provide a moral smoke screen for rent seeking activities consequently it will be extremely difficult to identify the actual level of rent seeking from the public interest activities therefore current empirical estimates may well underestimate the actual level of rent seeking in the regulatory arena

using differences in knowledge across neighborhoods to uncover the impacts of the eitc on earnings we develop a new method of estimating the impacts of tax policies that uses areas with little knowledge about the policy s marginal incentives as counterfactuals for behavior in the absence of the policy we apply this method to characterize the impacts of the earned income tax credit eitc on earnings using administrative tax records covering all eitc eligible lers from 19962009 we begin by developing a proxy for local knowledge about the eitc schedule the degree of sharp bunching at the exact income level that maximizes eitc refunds by individuals who report self employment income the degree of self employed sharp bunching varies signi cantly

gatt and environmental policy reform discussion agricultural protectionism in developed countries such as the united states and those in the european community ec involves subsidized production which has led to excess global supply and to low farm output prices in response the purported goal of the uruguay round of the gatt negotiations is to increase global efficiency in agricultural production and trade by eliminating distortionary subsidy programs additionally gatt opens the door for more general policy reform with an explicit focus on the environment papers by abler and shortle and by just and rausser address how agricultural interests and environmental resources may be affected by these reforms just and rausser argue that the key to policy reform is the political feasibility of the policy change a policy reform altering the current distribution of wealth will be contested by those currently empowered thus reforms will fail unless empowered interests are eased out and bought off compensated to take early retirement from the rent seeking game a golden parachute is necessary to ease the current patriarchs into the front porch rocking chair the relevant task becomes estimating the compensation package necessary to make environmental policy reform feasible to the agricultural community although both papers address the costs of political feasibility in gatt as well as environmental policy reform at least four issues remain unresolved first both papers address policy reform in a deterministic framework but target prices may be useful to stabilize returns of production the decoupling of program benefits could involve an increase in output price instability such that producer risk preferences come into play in addition even if we assume risk neutrality a nonlinear production risk could induce significant shifts in behavior the implication of adding a stochastic element moves us into the world of ex ante choice a world that buchanan and helms argue is less restrictive than the world of ex post choice inasmuch as the ex ante approach incorporates risk preference in a world of incomplete markets for environmental assets ex ante expenditures rather than ex post realized outcomes explain choice and welfare second whereas the empirical models are developed in a dynamic context the analytics of policy reform are static it could be useful to tie the empirical to the analytical by exploring policy reform in a dynamic setting that accounts for either repeated play or asymmetric information between players but this is a potential problem in that a multitude of potential nash or sequential equilibria likely exist see fudenberg and maskin the folk theorems for repeated games suggest that any feasible self interested payoff can be an equilibrium provided that the players are sufficiently patient the range of equilibrium compensation may be quite wide requiring explicit recognition of how expectations are formed for signaling games cho and kreps p 180 argue that what constitutes an equilibrium is powerfully affected by the interpretations that would be given by player b to messages that player a might have sent but in equilibrium does not send restrictions of out of equilibrium beliefs can reduce the number of acceptable equilibria but may require data that are impossible or extremely costly to acquire regardless stronger links between the dynamic processes associated with policy reform will provide a more rigorous framework for empirical estimation although the first two issues may be dismissed as technical nitpicking the third and fourth cannot the third involves the potential production and yield impacts of alternative policies the impact on the agricultural sector in both papers is large abler and shortle argue that implementation of a stylized version of the ec s macsharry plan of a two thirds decoupling jason f shogren is an associate professor in the department of economics iowa state university stan johnson lilyan fulginiti and pat westhoff provided useful comments journal paper no j 14795 of the iowa agriculture and home economics experiment station ames iowa project no 2872

food price policy the rationale for government intervention abstract policy makers in the most successful developing countries have not accepted either of the two major schools of thought on food price policy the neo classical school favours free trade to maximize efficiency of resource allocation the structuralist school favours interventions to satisfy goals for income distribution especially in the rapidly growing rice based economies of asia policy makers have been more concerned about stability of domestic prices than their level relative to world prices this concern traditionally dismissed by economists as purely political is justified on economic grounds because of improved macroeconomic and dynamic efficiency from stable food prices the paper identifies both the benefits from food price stability and the costs of achieving it

optimal food price stabilization in a small open developing country in poor countries most governments implement policies aiming to stabilize the prices of staple foods which often include storage and trade measures insulating their domestic market from the world market it is of crucial importance to understand the precise motivations and efficiency of those interventions because they can have consequences worldwide this paper addresses those issues by analyzing the case of a small open developing country confronted by shocks to both the crop yield and foreign price in this model government interventions may be justified by the lack of an insurance market for food prices considering this market imperfection the authors design optimal public interventions through trade and storage policies they show that an optimal trade policy largely consists of subsidizing imports and taxing exports which benefits consumers at the expense of producers import subsidies alleviate the non negativity of food storage in other words when stocks are exhausted subsidizing imports prevents domestic price spikes one striking result an optimal storage policy on its own is detrimental to consumers since its stabilizing benefits leak into the world market and it raises the average domestic price by contrast an optimal combination of storage and trade policies results in a powerful stabilizing effect for domestic food prices

expected consumer s surplus and the welfare effects of price stabilization suppose a consumer faces a price which is uncertain ex ante a question which often arises is whether the consumer would benefit from a stabilization policy under which the price would then be fixed and known with certainty many authors have addressed this question by calculating the expected compensating variation of the price change others have used expected marshallian consumer s surplus often with the explanation that it is a good approximation to expected compensating variation 2 an important unresolved issue however is whether expected compensating variation does in fact provide a valid ranking of stochastic prices against stabilized prices i e a ranking in agreement with that given by expected utility in section 2 we demonstrate that expected compensating variation is not in general a valid utility indicator in essence while utility comparisons under uncertainty require the use of the cardinal properties of von neumannmorgenstern utility functions the expected surplus measures depend only on ordinal preference rankings expected compensating variation then is completely insensitive to and cannot reflect the precise factor of interest in suchstudies the consumer s attitudes toward risk we then derive a set of restrictions on the utility function which are necessary in order for expected compensating variation to be a valid measure we see that price stabilization policies can only be evaluated with compensating variation if consumer preferences are assumed to satisfy quite stringent requirements this is in constrast to the familiar certainty case in which compensating variation always provides correct rankings

the gains from price stabilization a quantitative assessment a widely discussed problem in economics is the benefits from price instability the original work by waugh used consumer surplus to show that individuals benefit from price variation vis a vis stabilization at the mean a later model by oi did the same for producers while massel integrated the two analyses an excellent account of the development of this problem is turnovsky 1978 these analyses relied on models of consumer surplus with linear or log linear demand functions neither of which can be derived from utility maximizing behavior as a result these demand curves do not relate to known measures of consumer welfare such as hicksian compensated variation or the true cost of living realizing this hanock recast the problem in terms of the indirect utility function under the assumption of cardinal utility hanock and turnovsky shalit and schmitz derived the conditions including those relating to risk under which consumers gain under the assumption of ordinal utility we prove the proposition that consumers gain from price instability next these benefits are quantified via a monte carlo experiment

risk aversion supply response and the optimality of random prices a diagrammatic analysis this paper analyzes the effect of commodity price stabilization on producers and consumers both in the short run and in the long run when producers have adjusted their production decisions to take account of the change in the price distribution we derive conditions under which a both producers and consumers may be better off and b both producers and consumers may be worse off moreover we show that the long run effects may differ not only quantitatively but also qualitatively from the short run effects the anomalous results may occur even with reasonable assumptions concerning production functions and utility functions of producers and consumers

the rationality of u s regulation of the broadcast spectrum in his classic 1983 technologies of freedom ithiel de sola pool so elucidated the prevailing wisdom concerning broadcast licensure in the united states while the key legal questions surrounding this institution involve important first amendment questions hence pool s scarcity analogy to paper ink and presses economists and other policy analysts have often remarked on the more general incongruity in federal licensing while spectrum is regulated on the physical scarcity premise it is awarded to private users on a no fee basis thus conferring significant economic rents on private parties at substantial opportunity cost to the fisc moreover federal communications commission fcc 2 policies have openly sought virtually throughout the agency s entire life span to restrict broadcast licenses and competition for broadcasters particularly cable television to far below the quantity technically available 3 the

nonuse values in benefit cost analysis benefit cost analysis bca is a pragmatic realization of the theory of welfare economics much of the research associated with bca has sought to expand the types of benefits that can be measured in dollar terms with this research there has been a progressive movement of goods and services from the set without measures usually designated as intangibles in bca terminology to the set with for example the recreational services provided by projects associated with dams for hydroelectric power or flood control were regarded as intangible until the development of the travel cost model for estimating the demand for outdoor recreation sites one of the current frontiers in bca research is associated with modeling and measuring nonuse benefits in contrast to the past efforts with intangibles research on this topic has remained controversial with few direct effects on the practice of applied welfare economics there are two principal reasons for this outcome first there has not been an accepted set of definitions for nonuse benefits and second applied studies with empirical estimates of nonuse benefits have until recently been non existent clearly these problems are related a consistent set of definitions is a necessary prerequisite for empirical implementation i will argue that consistent definitions for nonuse benefits have been elusive because the conceptual frameworks used in the literature to describe its primary components option value and existence values are not mutually consistent in the process of demonstrating this result i will describe the elements of a consistent framework for treating both use and nonuse benefits and apply it in explaining some of the problems with the available empirical estimates of nonuse benefits

institutional technology and economic growth an endogenous model of constitutional changes and economic growth links the temporal decline in private market returns when technology is constant with the returns to rule changes realized in a political market there is a steady state constitutional setting in which all rule changes have been incorporated that is analytically equivalent to the neoclassical steady state as in the neoclassical model private sector technological progress postpones the steady state to the extent the original constitutional setting promotes innovation the evolutionary process toward the steady state is delayed the model yields a theory of revolution based on forces leading to the adoption of inefficient changes in the constitutional setting

oil and the macroeconomy since the 1970s economists have long been intrigued by empirical evidence that suggests that oil price shocks may be closely related to macroeconomic performance this interest dates back to the 1970s the 1970s were a period of growing dependence on imported oil unprecedented disruptions in the global oil market and poor macroeconomic performance in the united states thus it was natural to suspect a causal relationship from oil prices to u s macroeconomic aggregates since then a large body of work has accumulated that purports to establish this link on theoretical grounds and to provide empirical evidence in its support we do not attempt a comprehensive survey of this literature but rather provide an idiosyncratic synthesis of what we view as the key issues in this debate and the insights gained over the last 30 years the timing seems right for such an account although the experience of the 1970s continues to play an important role in discussions of the link between oil and the macroeconomy there have been a number of new oil price shocks since the 1970s notably the 1986 collapse of oil prices and the 2000 boom in oil prices as well as the oil price increases associated with the 1990 1991 gulf war and the 2003 iraq war given this richer case history we are arguably in a better position than two decades ago to distinguish the idiosyncratic features of each oil crisis from the systematic effects increases in oil prices have been held responsible for recessions periods of excessive inflation reduced productivity and lower economic growth in this paper we review the arguments supporting such views first we highlight some of the conceptual difficulties in assigning a central role to oil price shocks in explaining

one way arbitrage foreign exchange and securities markets a note theorem in the case of traders with exogenous needs to acquire foreign currency recently deardorff 3 coitned the phrase one way arbitrage to describe the behavior of those traders and showed that it probably precludes round trip covered interest arbitrage from breaking even deardorff s analysis focuses on the conditions under which in the presence of transaction costs there would be both spot and forward transactions on the foreign exchange markets at equilibrium in this paper we extend the analysis to derive the conditions under which transactions would exist in both the home and foreign securities markets and we generalize the results to the case of transactions in all markets

a model of covered interest arbitrage under market segmentation existing models of covered interest arbitrage typically assume market participants have equal capital and foreign exchange market access this paper derives sufficient conditions for the existence of neutral interest parity forward price bands when capital markets are segmented and exchange rates are dually quoted all forward price intervals are completely characterized in terms of simultaneous two way and one way arbitrage flow possibilities the parameters of the no arbitrage price region are shown to be established on the basis of relative advantage with respect to the set of available arbitrage strategies copyright 1991 by ohio state university press

consumer s surplus and welfare change in a simple dynamic model la somme escomptee d equivalents instantanes ou les variations compensees n est jamais un indicateur du bien etre economique exact pour un consommateur dont les preferences sont representees par une fonction utilite inter temporelle croissant

the impact of bad writing in economics we find significant style differences between articles written by economists for their professional journals and articles by the same economists in the wall street journal we find no evidence that style influences the professional success of economists which suggests that the private rewards to improving the quality of writing are low indeed each community of scholars has probably adopted a professionally correct writing style from which its members diverge little however scholars do alter their rhetorical style to communicate effectively with audiences other than the professional community this suggests that intra and inter group written communication by economists is efficient

valuing environmental damage the purpose of this paper is to review the most important parts of the economic theory and measurement of environmental damage the paper is structured as follows section 2 introduces the willingness to pay concept and money measures such as the compensating variation and the equivalent variation this section also offers an interpretation of money measures in terms of the outcome of a referendum section 3 defines the total value of an environmental asset in order to give the reader an idea of the complexity of the money measures used in recent empirical studies section 4 and 5 introduce risk or uncertainty and discuss the choice of money measure in a risky world in section 6 three frequently employed methods for the estimation of money measures are introduced the paper ends with some remarks regarding the limitations of these approaches to decision making copyright 1990 by oxford university press

consumer s surplus without apology the purpose of this paper is to settle the controversy surrounding consumer s surplus and by so doing to validate its use as a tool of welfare economics i will show that observed consumer s surplus can be rigorously utilized to estimate the unobservable compensating and equivalent variations the correct theoretical measures of the welfare impact of changes in prices and income on an individual i derive precise upper and lower bounds on the percentage errors of approximating the compensating and equivalent variations with consumer s surplus these bounds can be explicitly calculated from observable demand data and it is clear that in most applications the error of approximation will be very small in fact the error will often be overshadowed by the errors involved in estimating the demand curve the results in no way depend upon arguments about the constancy of the marginal utility of income consequently this paper supplies specific empirical criteria which can replace the apologetic caveats frequently employed by those who presently apply consumer s surplus moreover the results imply that consumer s surplus is usually a very good approximation to the appropriate welfare measures to preview below i establish the validity of these rules of thumb for a

does the law of one price hold in international financial markets evidence from tick data abstract this paper investigates the validity of the law of one price lop in international financial markets by examining the frequency size and duration of inter market price differentials for borrowing and lending services one way arbitrage using a unique data set for three major capital and foreign exchange markets that covers a period of more than seven months at tick frequency we find that the lop holds on average but numerous economically significant violations of the lop arise the duration of these violations is high enough to make it worthwhile searching for one way arbitrage opportunities in order to minimize borrowing costs and or maximize earnings on given funds we also document that such opportunities decline with the pace of the market and increase with market volatility

energy prices and the aggregate production function abstract this paper tests the hypothesis that the effects of increases and decreases in relative energy prices on output are symmetrical alternative ratchet specifications are embedded in an aggregate production function for private sector output and estimated using us data the major finding is that the relationship between relative energy prices and output is highly asymmetrical increases in relative energy prices above previous peak levels have a substantial deleterious effect on output decreases in relative energy prices and increases below the previous peak have no effect on output

obtaining contingent bounds for non contingent equivalent variations abstract government policies often distort the price distribution rather than stabilize or unstabilize prices recent examples are trade reforms previous contingent bounds of noncontingent equivalent variations are still valid however additional assumptions are required a byproduct is a generalized risk premium

uncertainty benefit cost analysis and the treatment of option value abstract this paper proposes a new conceptual framework for defining welfare measures under uncertainty the planned expenditure function this function describes the locus of expenditures on contingent claims that are required to realize a given level of expected utility to illustrate the convenience of the framework it is used to consider the definition of the option price the appropriate treatment of option value the valuation of risk changes and the definition of non use benefits under uncertainty

the resilience of the indian economy to rising oil prices as a validation test for a global energy environment economy cge model this paper proposes to test the global hybrid computable general equilibrium model imaclim r against macroeconomic data to do so it compares the modeled and observed responses of the indian economy to the rise of oil price during the 2003 2006 period the objective is twofold first to disentangle the various mechanisms and policies at play in india s economy response to rising oil prices and second to validate our model as a tool capable of reproducing short run statistical data with default parametrization the model predicts a significant decrease in the indian growth rate that is not observed however this discrepancy is corrected if three additional mechanisms identified by the international monetary fund are introduced namely the rise in exports of refined oil products the imbalance of the trade balance allowed by large capital inflows and the incomplete pass through of the oil price increase to indian customers this work is a first step toward model validation and provides interesting insights on the modeling methodology relevant to represent an economy s response to a shock as well as on how short term mechanisms and policy action can smooth the negative impacts of energy price shocks or climate policies

transactions costs and covered interest arbitrage theory and evidence the extent to which deviations from covered interest parity can be attributed to transactions costs has been exaggerated in the economic literature because the swap market in foreign exchange has been ignored it is shown that such deviations should be no greater than the lowest of the transactions costs in one of three markets the swap market or either of the two relevant securities markets this reconciles the theory with the data which show spreads of no more than a few basis points however the empirical results have no direct bearing on the conventional market efficiency hypothesis

a theory of competition among pressure groups for political influence this paper presents a theory of competition among pressure groups for political influence political equilibrium depends on the efficiency of each group in producing pressure the effect of additional pressure on their influence the number of persons in different groups and the deadweight cost of taxes and subsidies an increase in deadweight costs discourages pressure by subsidized groups and encourages pressure by taxpayers this analysis unifies the view that governments correct market failures with the view that they favor the politically powerful both are produced by the competition for political favors

california shows the future of electricity production in the single market in california pressure from industrial and commercial ratepayers has initiated liberalization in electricity production this us experience is important because the plausibility arguments against liberalization may reappear in the european debate on the single market

property rights and wireless license values abstract while extending the scope of spectrum property rights promotes efficiency such reforms are often deterred by equity concerns theoretically however the windfalls may be negative relaxing license restrictions may increase profits by allowing enhanced productivity yet liberalization across a class of licensees can reduce the expected profits by increasing competitiveness this article examines license value changes for regimes that decisively shift toward private property rights in radio spectrum by analyzing the average prices paid in international cellular phone license auctions during 1995 2001 this unique data set encompasses 1 365 licenses assigned by competitive bidding in 38 auctions held in 24 countries licenses awarded by regimes with more expansive spectrum property rights generated winning bids that were 61 percent lower adjusting for other factors this evidence reverses the equity argument against liberalization over the policy margin studied and is consistent with coase s view

rules versus discretion in food storage policies this article compares various policies in a rational expectations food storage model with risk averse consumers and missing insurance markets calibrated to represent a developing country i consider an optimal storage policy under discretion and two optimal simple rules a constant private storage subsidy and a price band the storage subsidy achieves welfare gains similar to the discretionary policy the price band maximizing social welfare is a price peg scheme the floor and ceiling prices are the same and the capacity constraint represents 11 of the steady state production level this price band achieves three quarters of the gains from the optimal policy under discretion

assigning property rights to radio spectrum users why did fcc license auctions take 67 years abstract while leo herzel 1951 and ronald coase 1959 persuasively argued for auctioning licenses issued by the federal communications commission fcc not until 1993 did the u s congress grant the fcc authority to assign wireless operating permits via competitive bidding why were auctions with obvious efficiency and equity advantages so long in coming why were comparative hearings in the public interest first abandoned as assignment tools in 1981 not for auctions but for lotteries and why were radio and tv licenses pointedly excluded from auctions four factors the special interest of regulators in influencing broadcasting content the limits placed on explicit program regulation by the u s constitution the recent increase in the relative economic importance of nonbroadcast wireless services and the agency problem embedded in central planning are used to explain both the political stability of economically inefficient licensing methods and recent reforms

default risk cannot explain the muni puzzle evidence from municipal bonds that are secured by u s treasury obligations fama 1977 and miller 1977 predict that one minus the corporate tax rate will equate after tax yields from comparable taxable and tax exempt bonds empirical evidence shows that long term tax exempt yields are higher than theory predicts two popular explanations for this empirical puzzle are that relative to taxable bonds municipal bonds bear more default risk and include costly call options i study u s government secured municipal bond yields which are effectively default free and nonmalleable these municipal yields display the same tendency to be too high i conclude that differential default risk and call options do not explain the municipal bond puzzle article published by oxford university press on behalf of the society for financial studies in its journal the review of financial studies

measuring option prices from market behavior abstract option prices can be calculated from empirical demand models given knowledge of the utility theoretic structure implied by the demand specifications and the joint density of the random variables consumers face formulas for option price are given for three common weakly complementary demand specifications because it can be difficult to assess behavioral uncertainty and calculate option prices in practice knowledge of the sign of option value is important since it is a guide to the bias from ignoring this type of uncertainty the sign of option value is determined for sources of uncertainty that have proved elusive in previous treatments

coordination in oligopoly the private and social efficiency of two behavioral coordination mechanisms is examined in this paper in cournot oligopoly firms prefer immediate coordination on the nash equilibrium interpreted as a preplay communication over the best reply dynamics and fictitous play which converge to the equilibrium but with delay interpreted as a decentralized learning process in bertrand oligopoly firms prefer the learning process these results indicate that firms have incentives to create institutions such as trade associations or informal meetings to facilitate coordination of production capacities but not prices moreover quantity agreements may even increase social welfare

optimal food price stabilisation policy this paper proposes a framework for designing optimal food price stabilisation policies in a self sufficient developing country it uses a rational expectations storage model with risk averse consumers and incomplete markets government stabilises food prices by carrying public stock and by applying a state contingent subsidy tax to production the policy rules are designed to maximise intertemporal welfare the optimal policy under commitment crowds out all private stockholding activity by removing the profit opportunity from speculation the countercyclical subsidy tax to production helps price stabilisation by subsidising production in periods of scarcity and by taxing it in periods of glut it contributes little to welfare gains most of which come from stabilisation achieved through public storage

public capital and private productivity this paper uses three different approaches to investigate whether the declining provision of public capital is a major cause of declining labor productivity the juxtaposition of approaches removes

the expected consumer s surplus as a welfare measure abstract the expected consumer s surplus ecs is often used as a monetary measure of consumer welfare examples include the theory of regulation competition policy and price stabilization this paper shows that in general the ecs does not convey any information about the consumer s ranking of price distributions if these differ in risk moreover the ecs provides rigorous monetary assessments of consumer welfare if and only if the consumer is risk neutral and has zero income elasticity of demand since empirical estimates suggest that these conditions are violated the paper serves as a warning to the continued use of the ecs

stochastic dominance and uncertain price prospects since the seminal and simultaneous publications of hadar and russell 6 and hanoch and levy 8 there has been a virtual explosion of papers investigating implications of stochastic dominance rules for decisions under uncertainty dominance principles have important applications to portfolio choice capital budgeting and financial intermediation stochastic dominance can also be applied to investment and production decision problems under uncertainty in these areas both overall and marginal impacts of uncertainty have received wide attention 2 the emphasis in consumer welfare analysis under uncertainty has been on the ranking of different price prospects ranking of price prospects is more complicated than that of income prospects for two related reasons first due to differences in ordinal preferences among consumers the second degree stochastic dominance rule on price prospects does not yield a unanimous ranking among risk averse consumers thus waugh 17 massell 12 and samuelson 14 have focused on the ranking of price prospects for a single consumer or consumers with identical ordinal preferences second there is no a priori reason for income risk averse consumers to exhibit aversion to fair price risks specifically the indirect utility function of an income risk averse consumer is neither concave nor convex in prices indirect ways of comparing consumer welfare under alternative price prospects via expected consumer surplus expected compensating variation or expected equivalent variation have thus been investigated in the literature expected consumer surplus ecs has been particularly popular for ranking certain and uncertain price prospects 3 however turnovsky shalit and schmitz 16 showed that the ranking

optimal abolition of fcc spectrum allocation ronald coase based his 1959 call for spectrum markets on theoretical conjecture today abundant evidence supports his case targeted liberalization in cellular markets as contrasted with regulatory planning of the digital tv transition and other traditional policies suggest enormous efficiency gains are available from wider use of the price system with exclusive frequency rights assigned to owners markets widely reconfigure spectrum use coordinating complex spectrum sharing resulting social gains include increased consumer surplus from enhanced technological innovation and wireless service competition a social bonus arrives in the benefits associated with wider scope for free speech yet the administrative allocation system continues to distribute rents and garner political support liberal reforms in contrast produce large but broadly dispersed efficiency gains and are undersupplied this paper proposes an incremental extension of property rights in spectrum to move beyond the current rent seeking equilibrium eliminating the federal communications commission s centralized spectrum allocation process and with it an attractive nuisance generating anticonsumer outcomes

the productivity slowdown the oil shocks and the real cycle f ive facts stand out about economic performance in the united states since world war ii the first is that for most of the postwar period the u s has had a slower rate of economic growth than the other major developed democracies except great britain and much lower rates of growth than germany japan and italy the gap between the growth of per capita income of the united states and comparable countries has however tended to diminish over time and the united states has lately grown at about the same rate as most other developed countries the second outstanding fact is that the united states has fallen far behind in many mass production industries in which it used to lead the world whereas it is ahead of other nations in many new and especially high technology industries in automobiles steel tires household appliances and earth moving and farm equipment for example u s production has fallen dramatically in relation to output in most comparable countries and the country has become a net importer of most such products by contrast in newer industries such as computers jet aircraft sophisticated weaponry and high technology in general the united states is often dominant both as producer and exporter the third outstanding fact is that most of the older heartland of american industry roughly the area north and east of an arc drawn from baltimore to st louis to milwaukee has declined dramatically in comparison with the south and the west this change in regional fortunes has been due in large part to migration motivated by differences in economic prospects from the declining to the advancing

beyond keynesianism and monetarism though there is consensus among economists about microeconomic theory neither the keynesian nor the monetarist theory of macroeconomics has attracted a consensus presumably because neither is compelling enough to persuade the skeptical a new approach to the subject that combines insights from each of the familiar schools with considerations that both schools have overlooked is accordingly offered here this argument accepts the evidence that involuntary unemployment and depressions sometimes occur and thus rejects the finding of the new classical or equilibrium macroeconomics that markets always clear and that all individuals and firms are in equilibrium it also rejects the keynesian assumption of wages or prices arbitrarily fixed at disequilibrium levels and insists that any adequate theory must show what interests are served by the existence of involuntary unemployment the theory offered here shows that an institutional or organizational arrangement common in all societies which have experienced widespread unemployment and deep recessions entails that many firms and individuals will be in disequilibrium this disequilibrium becomes more severe when there is unexpected deflation or disinflation the disequilibrium is of precisely the type commonplace in recessions and entails involuntary unemployment the theory also shows how groups of individuals and firms can gain from practices that entail involuntary unemployment and underutilization of resources for others