substitute goods auctions and equilibrium this paper identifies two notions of substitutes for auction and equilibrium analysis weak substitutes the usual price theory notion guarantees monotonicity of t tonnement processes and convergence of clock auctions to a pseudo equilibrium but only strong substitutes which treats each unit traded as a distinct good with its own price guarantees that every pseudo equilibrium is a walrasian equilibrium that the vickrey outcome is in the core and that the law of aggregate demand is satisfied when goods are divisible weak substitutes along with concavity guarantees all of the above properties except for the law of aggregate demand

walrasian equilibrium with gross substitutes in this paper we study the problem of efficient production and allocation of indivisible objects among a set of consumers we assume that the agents preferences depend on the bundle of objects and the quantity of money they consume furthermore we assume that preferences are quasilinear in money and that agents have a large endowment of money with indivisibilities it is well known that many familiar properties of the utility functions fail to ensure existence in their striking analysis of the matching problem kelso and crawford 5 introduce the gross substitutes gs condition which ensures the non emptiness of the core we propose two new conditions and show that with quasilinearity they are equivalent article id jeth 1999 2531 available online at http www idealibrary com on

historical reference hume and critical realism the purpose of this paper is to make the case for discussing developments in the history of thought as having the potential to inform modern discussion this is not to deny the importance of context or that new knowledge emerges over time which was not available to earlier thinkers but neither is taken as sufficient reason to deny any possibility of us learning from past thought the case is made by means of discussion of the particular relevance of david hume s thought for critical realism this is particularly controversial in that hume has been identified by critical realists as the inspiration for logical positivism from which critical realism dissents while critical realism is a body of thought of recent development it is argued here that hume has sufficient in common with critical realism to warrant considering the possibility that critical realists might learn from hume the notion that context is significant is used constructively by suggesting that important elements in common between the contexts of hume and of modern discussions reinforce the potential value of considering hume s ideas it is concluded that there is the potential for growth in knowledge from reference between the history of thought and modern discussions in economics and in particular between the nature and origins of hume s thought and the development of critical realism

efficient policies for green design in a vintage durable good model using a dynamic durable good model we investigate efficiency restoring policy schemes in case of free garbage disposal in the long run efficiency is attained by a subsidy on recyclability of the durable and a tax on the purchase of the durable on the short run adjustment path in contrast both policy instruments may change their signs such that the government harms recyclability by taxing it and promotes the demand for the durable good by subsidizing it a deposit refund system is shown to yield the efficient allocation both in the short run as well as in the long run

realist philosophy of the social sciences and economics a critique this paper deals with critical realism as a contribution to the philosophy of the social sciences in the first section critical realism is introduced differences from other philosophies of sciences espicially positivism and falsificationism are discussed in the second section critical realism is criticised first for failing as a normative philosophy of science second for relying upon an impoverished notion of knowledge acquistion and finally for its unsuitablity as a contribution to social theory

on some criticisms of critical realism in economics methodological comments on critical realism in economics have proliferated over the past decade typically focusing on tony lawson s economics and reality and reorienting economics which constitute the core of this project in the present paper we select a series of important mostly very recent arguments against critical realism in economics and assess their merits and demerits

synthesizing the malthusian and senian approaches on scarcity a realist account food entitlement decline fed and food availability decline fad are two approaches to explaining famines that have different policy implications one focuses on the systemic level whereas the other is concerned with the individual level they therefore analyse relatively distinct causal mechanisms thus an important question is whether these approaches can be reconciled another related question is how fad and fed based explanations relate to classical malthusian views about rapid food requirement increase fri this paper analyses these questions and argues that these three approaches can indeed be reconciled within a single framework by outlining the causal sources of fad fed and fri this task requires among other things the separation of ontological categories and empirical measures as a consequence of this argument the paper suggests that there are only seven possible ontological combinations of how a famine situation can arise as a direct cause simultaneously it maintains that there are virtually an infinite number of ways in which these combinations may act as indirect causes rooted in economic political and social conditions the analysis is exemplified by the bengal famine of 1943 because that famine is a well known case the wider research and policy applicability of this general account are discussed but have yet to be tested in relation to other scarcity cases water land fish this synthesis is made possible by the incorporation of critical realist interventions into economic theory

environmental policy public finance and the labour market in a second best world abstract environmental and tax policies and the optimal provision of clean and dirty public goods are analysed within the context of a second best framework of optimal taxation households consume both clean and dirty commodities degradation of the natural environment occurs due to the consumption of dirty private and public goods but can be offset when the government engages in abatement activities increased environmental concern implies a higher dirt tax a lower tax on labour less employment more public abatement and a cleaner environment if the elasticity of substitution between private consumption commodities and leisure is large and that between clean and dirty goods is small public consumption may expand while private consumption contracts otherwise public consumption falls

garbage recycling and illicit burning or dumping abstract with garbage and recycling as the only two disposal options we confirm prior results that the optimal curbside fee for garbage collection equals the direct resource cost plus external environment cost when illicit burning or dumping is a third disposal option that cannot be taxed directly the optimal curbside tax on garbage changes sign the optimal fee structure is a deposit refund system a tax on all output plus a rebate on proper disposal through either recycling or garbage collection the output tax helps achieve the first best allocation even though it affects the choice between consumption and untaxed leisure

the microeconomics of efficient group behavior identification1 consider a group consisting of s members facing a common budget constraint p 1 any demand vector belonging to the budget set can be privately or publicly consumed by the members although the intragroup decision process is not known it is assumed to generate pareto efficient outcomes neither individual consumptions nor intragroup transfers are observable the paper analyzes when to what extent and under which conditions it is possible to recover the underlying structure individual preferences and the decision process from the group s aggregate behavior we show that the general version of the model is not identified however a simple exclusion assumption whereby each member does not consume at least one good is sufficient to guarantee generic identifiability of the welfare relevant structural concepts

identifying combinatorial valuations from aggregate demand abstract we study identification of combinatorial valuations from aggregate demand each utility function takes as arguments subsets or alternatively quantities of the multiple goods we exploit mathematical insights from auction theory to generically identify the distribution of utility functions in our setting aggregate demand for each item is observable while demand for bundles is not nevertheless our identification result allows us to recover the latter

demand systems with and without errors revealed preference theory assumes that each consumer has demands that are rational meaning that they arise from the maximization of his or her own utility function in contrast econometric or statistical demand models assume that each consumer s demands equal a rational systematic component derived from a common utility function plus an individual specific additive error term this paper reconciles these differences by providing necessary and sufficient conditions for rationality of statistical demand models given individual consumer rationality

the unknown masterpiece marx s model of capital this paper develops an alternative to traditional interpretations of karl marx rooted in his 1859 preface widely regarded as the definitive summary of his materialist conception of society it does this by reading marx in the light of the ontology of realism and the reproductive mode of inference via an examination of some pivotal texts centered around the grundrisse notebooks the paper indicates how a realist understanding of marx s reproductive method can be used to reconstruct and develop its creation marx s model of capital copyright 1998 by oxford university press

heterogeneity and the non parametric analysis of consumer choice conditions for invertibility this paper considers structural non parametric random utility models for continuous choice variables with unobserved heterogeneity we provide sufficient conditions on random preferences to yield reduced form systems of non parametric stochastic demand functions that allow global invertibility between demands and non separable unobserved heterogeneity invertibility is essential for global identification of structural consumer demand models for the existence of well specified probability models of choice and for the non parametric analysis of revealed stochastic preference we distinguish between new classes of models in which heterogeneity is separable and non separable in the marginal rates of substitution respectively

valuing new goods in a model with complementarity online newspapers many important economic questions hinge on the extent to which new goods either crowd out or complement consumption of existing products recent methods for studying new goods rule out complementarity by assumption so their applicability to these questions has been limited i develop a new model that relaxes this restriction and use it to study competition between print and online newspapers using new micro data from washington dc i estimate the relationship between the print and online papers in demand the welfare impact of the online paper s introduction and the expected impact of charging positive online prices

estimating multiple discrete choice models an application to computerization returns buyers in many markets face multiple discrete choices they can purchase multiple units as well as multiple brands at the same time this paper presents a multiple discrete choice model for the analysis of differentiated products demand users maximize profits by choosing the number of units of each brand they purchase i estimate the model using micro level data on the demand for personal computers i use the estimated demand structure to assess the welfare gains from computerization and technological innovation in peripherals the estimated return on investment in personal computers is 92 moreover a 10 increase in the performance to price ratio of microprocessors leads to a 2 2 gain in the estimated user surplus the personal computer pc market is of interest to industrial organization economists because of its size the continual technological change and above all because of the farreaching implications of pcs on the economy as a whole several distinct features make pc demand difficult to model pcs are a differentiated durable good in constant technological evolution moreover buyers make multiple discrete choices firms according to our data spread their purchases of pcs over different brands at the same time they buy pcs in blocks several units of each brand that they have chosen the aim of the paper is to present a model that captures these features and to use this model to estimate the welfare gains from computerization classical discrete choice models allow one choice among mutually exclusive alternatives in contrast the proposed framework allows users to demand multiple units and multiple brands the model can be applied to other cases of multiple discrete choices e g the composition of airline fleets car holdings per household the fields of the faculty in economics departments household cereals consumption or any other good consumed in more than one variety during a relevant time period although pervasive multiple discrete choice problems have received little attention because of their complexity a central issue regarding the pc market is the current controversy in the economics literature about the computerization puzzle this puzzle stems from the empirical finding that computerization has had no effect on firm productivity griliches and siegel 1991 and morrison and berndt 1990 contrary to those results hendel 1994 and lichtenberg 1995 using more disaggregate data than most previous studies report excess returns to computerization this indicates that data aggregation may have created the computerization puzzle in this paper i present a model consistent with the basic

feminist and post keynesian economics challenges and opportunities there are significant areas of difference between feminist and post keynesian economics some feminist contributions to discussions about ontology and critical realism suggest strong reluctance to adopt realist philosophies and these provide a marked contrast with post keynesians frequent appeals for economics to reflect reality at the same time however some post keynesians are calling for a more inclusive pluralist approach to economic research a discussion that has areas of commonality with various feminist discussions of epistemology continued productive dialogue between the two traditions may be facilitated through an understanding of their contrasting ontological and epistemological debates it may be further accommodated by growing recognition of the potential advantages of utilising plural methods to address specific research questions copyright the author 2007 published by oxford university press on behalf of the cambridge political economy society all rights reserved oxford university press

the effect of bottle laws on income new empirical results eleven us states have bottle laws deposit refund programs that combine a consumption tax with a recycling rebate when states set the bottle deposit low enough it becomes a tax on high wage earners for whom the opportunity cost of their time prevents them from returning containers for their deposit however this bottle deposit will still be high enough that harvesting recyclables provides employment for low wage earners using individual data on observed cash recycling behavior this paper shows that an unintended consequence of bottle laws is that they have the potential to increase the incomes of very low wage workers

assessing the economic cost of greenhouse induced sea level rise methods and application in support of a national survey the potential cost of sea level rise has dominated many of the recent estimates of the economic damage that greenhouse warming might inflict on the united states over the course of the next century the cost of coastal protection and abandonment accounted for more than 80 of the early nordhaus estimate of likely damages part of a review of the then existing evidence which suggested that an effective doubling of atmospheric carbon concentrations might cost 0 26 of annual gdp the proportion of total cost attributed to sea level rise was a much smaller 11 in cline but the sea level rise costs that he quoted were among the most broadly accepted of his longer list of damages the relative importance of sea level rise in assessing the potential cost of greenhouse warming and thus in evaluating the potential benefit of any mitigating strategy has brought the original damage estimates under closer scrutiny a series of integrated assessments of aggregate damages has begun each has noted that the titus estimates were based on the assumptions that all developed property would be protected and that all undeveloped property including wetlands would be abandoned these assumptions were supported by comparisons of the economic vulnerability estimatesmore produced by yohe and protection cost estimates produced by weggel but they are clearly too simplistic some of each type of property will be abandoned though in which case the true future economic cost of sacrificed property must also be added to the damage calculus across an equally diverse collection of coastal sites moreover the decision of when whether and for how long to protect any piece of property will involve accurately weighing the tradeoff between the cost of its protection and the economic cost of its abandonment a balancing calculation which must be conducted on a site by site basis the key is to consider the world as it is likely to be and not necessarily as it is now 26 refs 1 fig 7 tabs less

feed in subsidies taxation and inefficient entry we study energy markets with dirty production and lumpy entry costs of clean production renewables for intermediate entry costs markets yield inefficient production and inefficient entry a mix of three popular regulatory instruments polluter taxation feed in subsidies for renewables and consumption taxation cannot correct these market failures for larger entry costs the instruments are imperfect because they affect marginal incentives whereas entry is a lumpy fixed cost problem whenever the first best is implementable feed in subsidies and consumption taxes are redundant the second best requires feed in subsidies or consumption taxes in addition to a pollution tax and overshoots first best levels given production levels the instruments do not affect the regulator s budget

the demand for local telephone service a fully discrete model of residential calling patterns and service choices we present an empirical model of households choices among local telephone service options for example between flat rate and measured service and the interrelation of these choices with the number and average duration of local calls households make at each time of day to each geographical zone using a nested logit model with estimation performed on a randomly selected subset of the households calling patterns we calculate elasticities of demand for each local service option number of calls average duration and revenues with respect to the fixed monthly charges and the usage charges for calling under each option we find moderate price elasticities of number of calls with respect to usage charges for households subscribing to measured service nevertheless raising usage charges has a negligible effect on revenues since a sufficient number of households either originally subscribe to flat rate service or convert to flat rate service in response to higher usage charges we find a high elasticity of demandfor each service option with respect to itsfixed monthlyfee this indicates high substitutability among service options the shift among service options induces new calling patterns which wefind to be a small but not negligible indirect effect e most telephone operating companies offer residential customers several options for local service there are two general categories of service flat rate service under which a household can for a fixed monthly charge make an unlimited number of calls within a specified geographical area and measured service for which the household pays a lower fixed monthly fee but can make only a specified number or dollar value of calls at no extra charge after which charges are incurred for additional calls various flat rate services differ in the size of the geographical area in which calling is at no extra charge with higher monthly fees for larger areas measured services differ with respect to the threshold number or dollar value of calls beyond which the customer is charged

two generalizations of a deposit refund system this paper suggests two generalizations of the deposit refund idea in the first we apply the idea not just to solid waste materials but to any waste from production or consumption including wastes that may be solid gaseous or liquid using a simple general equilibrium model we derive the optimal combination of a tax on a purchased commodity and subsidy to a clean activity such as emission abatement recycling or disposal in a sanitary landfill this two part instrument is equivalent to a pigovian tax on the dirty activity such as emissions dumping or litter in the second generalization we consider the case where government must use distorting taxes on labor and capital incomes to help meet the revenue requirement would the optimal deposit be raised and the refund reduced we derive the second best revenue raising drs or two part instrument to answer that question this abstract was borrowed from another version of this item

multiple discreteness and product differentiation demand for carbonated soft drinks for several of the largest supermarket product categories such as carbonated soft drinks canned soups ready to eat cereals and cookies consumers regularly purchase assortments of products within the category consumers often purchase multiple products and multiple units of each alternative selected on a given trip this multiple discreteness violates the single unit purchase assumption of multinomial logit and probit models the misspecification of such demand models in categories exhibiting multiple discreteness would produce incorrect measures of consumer response to marketing mix variables in studying product strategy these models would lead to misleading managerial conclusions we use an alternative microeconomic model of demand for categories that exhibit the multiple discreteness problem recognizing the separation between the time of purchase and the time of consumption we model consumers purchasing bundles of goods in anticipation of a stream of consumption occasions before the next trip we apply the model to a panel of household purchases for carbonated soft drinks