piecemeal trade reform in presence of producer specific domestic subsidies abstract we extend the theory of unilateral piecemeal tariff reforms by considering both economy wide tariffs and sector specific production subsidies distortions sufficient conditions for welfare improving policy reforms involve both tariffs and sector specific distortions changes and require stronger assumptions on goods substitutability and the structure of distortions

a minimum wage can be welfare improving and employment enhancing abstract we examine whether minimum wages can fulfill a useful role as part of an optimal tax transfer scheme the government cannot observe household abilities only their incomes and is constrained to ensure that those working are at least as well off as those not working a minimum wage combined with the institutional features of typical welfare systems allows the incentive constraint to be severed at the ability level associated with the minimum wage if such a scheme can be enforced the government can increase the amount of redistribution from those working to those not working and possibly lower the number of unemployed

negotiation and renegotiation of optimal financial contracts under the threat of predation this paper examines the effect of renegotiation on the ability of financial contracts between a lender and entrant to deter an incumbent s predation in the presence of renegotiation it is more difficult for the entrant to obtain financing and more difficult for the contract to deter predation contracts successfully deter predation in some cases however even if renegotiation occurs at a stage with symmetric information between the entrant and lender giving the entrant constrained by limited liability stronger bargaining power vis a vis the lender improves the efficiency of the optimal contract but the results concerning renegotiation are unchanged copyright 1996 by blackwell publishing ltd

a method for evaluating the excess burden associated with characteristics of the goods abstract subsidies aimed at heterogeneous goods as housing do not merely generate the traditional excess burden there is another welfare loss since the distortion affects non price characteristics we show that the aforementioned welfare loss exists and can be quantified

should a carbon tax be differentiated across sectors abstract if some but not all countries are cooperating to reduce co2 emissions one could make the following argument a high carbon tax for carbon intensive tradeable sectors in the cooperating countries will reduce the production of goods from these sectors and therefore co2 emissions in the cooperating countries however this will to a large extent be counteracted by increased production of such goods in the countries that have no climate policy and since it is only total co2 emissions from all countries that are relevant for the climate there is no point in a policy that simply relocates co2 emissions from the cooperating countries to the countries that have no climate policy according to this line of reasoning carbon intensive tradeable sectors should thus face a lower carbon tax than other sectors of the economy this paper shows that a carbon tax should not be differentiated across sectors in the economy provided one can use import and export tariffs on all traded goods it is also shown that such a differentiation of carbon taxes is optimal for the cooperating countries if they are prevented from using tariffs on the traded goods however informational or political factors constraining the use of tariffs are likely also to constrain the possibility of differentiating carbon taxes between sectors

simple structural econometrics of price elasticity this paper delivers a methodology for the identification of the price elasticity of demand the approach relies on a structural model of consumer behavior wherein demand and expenditure depend on a heterogeneity factor we show that the structural parameters are not identified in the one period case conversely in a two period case the structural parameters and thus the price elasticity of demand are identified for each period

the ramsey problem for congestible facilities abstract in recent years a new set of models drawing on vickrey 1969 has been developed to analyze the economics of congestible facilities these models are structural in that they derive the cost function from consumers time of use decisions and the congestion technology standard models in contrast simply assume the general form of the cost function we apply the new approach to analyze the ramsey problem for a congestible facility and show that the solution generally entails cost inefficiency standard models have failed to reveal this result because they treat the cost function as completely determined by technology

in kind transfers self selection and optimal tax policy abstract this paper examines the role of public provision of goods as a redistributive mechanism when tax policies are designed optimally on the basis of the information available to the government we characterize pareto efficient allocations that are attainable through the tax policy and derive the conditions under which public provision will enhance welfare above the maximum that can be achieved through a mix of a general income tax and commodity taxes price subsidies first when there are two produced goods we prove that public provision is always pareto improving the improvement is achieved through changing individuals actual consumption levels second with no restrictions on the number of goods we derive a sufficient condition for public provision to be pareto improving this is achieved by weakening self selection constraints so that welfare improving tax changes are made possible suitable examples include provision of day care basic health care and rights to a minimum old age pension

the political economy of publicly provided private goods abstract this paper integrates two different approaches to the analysis of public provision of private goods education health care day care etc while normative public economics has established an efficiency case for such provision the commonly held political economy view has been that it is an economically inefficient phenomenon generated by the political process we establish a political economy framework which in general yields an efficient choice of distributional policy it follows that the central mechanism studied in the normative theory is equally relevant to voting models of decisions on public provision it is shown that under plausible information constraints economically efficient public provision of private goods will be part of politically rational decisions the result is established both within a median voter process and a representative democracy of political parties

tariff and quota reform with international capital mobility in a small open economy with a convex production set international capital mobility raises the cost of tariff protection on one subset of imports if there are irremovable quotas on another given irremovable quotas on one subset of imports free trade is the optimal policy toward all other imports with or without international capital mobility further in the scalar case international capital mobility reduces the optimal implicit excess tariff on the quota constrained import if an irremovable tariff is in place on the other import

equity and efficiency in public sector pricing a case for stochastic rationing a view still widely held among economists is that given the objective of maximizing a paretian social welfare function rationing of private goods is inferior to transfers and subsidies hence existing rationing e g in housing programs involving rent regulation subsidized medical treatment to needy individuals distribution of day care for children according to need etc is often interpreted as a reflection of paternalistic objectives on the part of the government or simply as bad policy see tobin 1970 the purpose of this paper is to challenge the general validity of this conventional wisdom in the context of a traditional model of public sector pricing supplemented by an anonymous rationing scheme which affects individuals consumption patterns significantly as is often the case a government cannot achieve distributional equity i e situations where the social value of marginal utility of income is equal for all individuals by means of taxes and transfers because the use of these instruments is subject to various constraints this is a common feature of many taxation models cf atkinson and stiglitz 1980 from a purely technical point of view there is scope for improving on social welfare in such situations by means of other measures such as rationing but since the use of rationing as well as taxes and transfers is likely to be restricted by the same underlying factors e g information about consumers preferences and endowments or administrative costs it may be questioned whether rationing qualifies as an efficient policy instrument the type of rationing considered in this paper is stochastic rationing when prices are set at levels which generate excess demand some of the potential consumers are randomly barred from the markets entirely so that demand equals supply from the point of view of implementation such a rationing scheme has the desirable property of not requiring the government to have information about preferences and endowments at the individual consumer level nor is extensive administration required another interesting aspect of such a scheme is that in a sense it represents a lower bound on rationing schemes since in most cases actual rationing can be based on some information about consumers therefore if there are cases where a market clearing equilibrium can be improved upon by reducing prices below market clearing levels combined with elimination of excess demand by means of stochastic rationing the argument for rationing as a potentially efficient policy tool is in fact fairly strong in this paper we show that such cases do exist we also indicate that stochastic rationing may still be efficient even in situations where prices can be highly differentiated among different groups of individuals e g income groups we conclude that the absence of costless redistribution of income which indeed seems to be consistent with real world situations is crucial for the results two kinds of policy changes are considered the first involves eliminating a marginal excess demand by means of rationing in the model in this paper there is a continuum of consumers therefore while such a marginal rationing affects some consumers in a nonmarginal fashion it only affects an infinitesimal group of consumers hence it only

competing vertical structures precommitment and renegotiation we consider a model where two agents privately informed about their own characteristics play a normal form game on behalf of two uninformed principals we analyze the existence of precommitment effects through public announcements of contracts in a model where agency contracts designed ex ante can always be secretly renegotiated at the ex ante and interim stages we show that the existence of precommitment effects depends both on the strategic complementarity of the agents actions and on the direct effect of the opponents actions on each principal s welfare in our model the possibility of renegotiation is crucial for the existence of precommitment effects the results are introduced through an example of cournot and bertrand competition between firms viewed as vertical structures

efficient estimation of structural hedonic systems when a product or job is not homogeneous but instead embodies several different characteristics it is difficult to use price information about the product to learn anything about the structure of the supply and demand for the embodied characteristics s rosen 1974 highlighted this problem and suggested that the estimated slope of the price characteristic relation the marginal price could be used instead of standard prices in otherwise standard estimation of the supply and demand system however recently brown and h rosen 1982 brown 1983 and mendelsohn 1985 have pointed out that this method is applicable only when the marginal price depends on variables not found in the supply and demand equations in this paper we show that since the hedonic system matches consumers with high demand for the characteristic to firms with low costs of producing it exogenous variables from the supply equation are not valid instruments in the demand equation and vice versa therefore even when the brown rosen mendelsohn brm condition holds estimation of the identified system by standard simultaneous equations techniques will produce inconsistent estimates we then show that the system can be identified despite the absence of the standard instruments and develop an efficient estimator for the identified system since cross equation constraints make estimation of hedonic systems particularly vulnerable to specification error we also consider some specification tests in this section we consider a simple model with only one characteristic the extension to several characteristics is straightforward the basic model developed by rosen can be described as follows firms with different technologies produce products which provide consumers with varying levels of some characteristic z each consumer buys one unit of the good the product is such that an amount of z from two units of the good provides less utility than the same amount of z embodied in a single unit e g acceleration in a car safety in a job consumers

beyond implicit prices recovering theoretically consistent and transferable values for noise avoidance from a hedonic property price model using a two stage hedonic pricing methodology we estimate a system of structural demand equations for different sources of transport related noise in the first stage we identify market segments using model based clustering techniques and estimate separate hedonic price functions hpfs for each segment in so doing we show how a semiparametric spatial smoothing estimator outperforms other standard specifications of the hpf in the second stage we control for non linearity of the budget constraint and identify demand relationships using techniques that account for problems of endogeneity and censoring of the dependent variable our estimated demand functions provide welfare estimates for peace and quiet that we believe to be the first derived from property market data in a theoretically consistent manner

willingness to pay for car safety evidence from sweden this study estimates a marginal willingness to pay wtp function for a road mortality risk reduction observed marginal wtp from the swedish car market is used and found to be positively correlated with the baseline risk of the cars no statistically significant relationships between examined owner attributes e g wealth and background risk and marginal wtp are found when comparing the estimated monetary value of a non marginal risk reduction derived from the integral of the marginal wtp function with an estimate based on marginal wtp we find in line with expectations that the difference between the estimates is negligible for smaller risk reductions and small 4 10 also for relatively large risk reductions

tariffs quotas and piecemeal policy reform abstract this paper extends recent results on the welfare implications of piecemeal tariff adjustments to include cases where the initial trade distortions involve both tariffs and quotas it shows that the standard prescriptions for piecemeal tariff reform are largely unaffected by the presence of unalterable quotas on other goods prescriptions for piecemeal quota reform are also derived although they are constrained by the presence of unalterable tariffs

price and income elasticities of demand for housing characteristics in the city of barcelona garcia j and raya j m price and income elasticities of demand for housing characteristics in the city of barcelona regional studies this paper estimates price and income elasticities of demand for housing characteristics using the information of properties appraised in the city of barcelona 1998 2001 it employs a two stage approach estimating hedonic price equations for different districts in order to estimate subsequently the corresponding demand equations the results allow an analysis to be made of the complementarity or substitutability relationships among the characteristics analysed and also to catalogue these characteristics as goods by knowing the price cross and income elasticities of housing characteristics policy recommendations can be made about the type of housing units that are the most desirable to be subsidized garcia j et raya j m les elasticites par rapport au prix et au revenu de la demande de caracteristiques particulieres du logement a barcelone regional studies a p

welfare improving user charges for publicly provided private goods it is argued that free provision of publicly provided goods or services is rarely optimal the argument is simple if optimal lump sum transfers are not available then the government will wish to use all handles which provide information about the distribution of welfare one such handle may be the usage of publicly provided goods and services as long as this is not uniform then it is a potentially valuable index for redistributive purposes this is illustrated using two models one in which usage of the publicly provided good is legislated by the government and another in which it is determined in part by the private costs of consuming public services

transfers in cash and in kind theory meets the data we review theoretical explanations for in kind transfers in light of the limited empirical evidence after reviewing the traditional paternalistic arguments we consider explanations based on imperfect information and self targeting we then discuss the large literature on in kind programs as a way of improving the efficiency of the tax system and a range of other possible explanations including the samaritan s dilemma pecuniary effects credit constraints asymmetric information amongst agents and political economy considerations our reading of the evidence suggests that paternalism and interdependent preferences are leading overall explanations for the existence of in kind transfer programs but that some of the other arguments may apply to specific cases political economy considerations must also be part of the story

a dynamic quantity adjustment process in a small open economy and welfare effects of tariff changes abstract considered an n good small open economy where the technology is strictly convex and ad valorem tariffs are imposed in this world it is known that the tariff utility relationship may be perverse the fact is known as the vanek bhagwati paradox the source of the perversity is found in aggregate income effects the present paper shows that d stability of our dynamic system implies non perverse aggregate income effects and hence the non perverse tariff utility relationship

topping up or opting out the optimal design of public provision schemes there is extensive public provision of private goods in all developed countries the public provision scheme is often designed so that individuals can opt out but not top up supplement the publicly provided quantity quality using an optimal income ta

coordinating climate and trade policies pareto efficiency and the role of border tax adjustments abstract this paper explores the role of trade instruments in globally efficient climate policies focusing on whether or not some form of border tax adjustment bta is warranted when carbon prices differ internationally the analysis shows that while there is no case for bta when all instruments can be freely deployed pareto efficiency does require a form of bta when carbon taxes in some countries are constrained its purpose then is to partly counteract the impact on emissions of inappropriate carbon pricing there or equivalently to undo the trade distortions such pricing creates the required form of bta is generally complex but a special case is identified in which it optimally has the simple structure envisaged in practical policy discussions it is also shown that the efficiency case for bta depends critically on whether climate policies are pursued by carbon taxation or by cap and trade

viewpoint innovations in the theory and practice of redistribution policy we present a survey of key results from second best optimal redistribution theory and their implications for tax transfer policy the core results include the corlett hague theorem the deaton conditions the production efficiency theorem the atkinson stiglitz theorem and the mirrlees saez characterization of the optimal non linear income tax system these have been augmented in recent years by optimal participation tax rates the implications of involuntary unemployment the use of unconventional instruments such as minimum wages in kind transfer and workfare and the optimal taxation of capital income and bequests l auteur presente un survol des principaux resultats theoriques de la redistribution optimale de second ordre et de leurs implications pour les politiques d imposition et de transferts les resultats fondamentaux incluent le theoreme de corlett hague les conditions de deaton les theoremes d efficacite en production le theoreme d atkinson stiglitz ainsi que la caracterisation du systeme optimal d imposition non lineaire du revenu a la mirrlees saez ces derniers resultats ont ete enrichis au cours des dernieres annees par certains autres portant sur les taux d imposition decoulant des allocations conditionnelles les implications du chomage involontaire l usage d instruments non conventionnels tels que le salaire minimum les transferts en nature le workfare ainsi que l imposition optimale des revenus du capital et des legs ces resultats sont exposes et leurs implications pour les politiques d imposition et de transferts sont discutees

identifying hedonic models economic models for hedonic markets characterize the pricing of bundles of attributes and the demand and supply of these attributes under different assumptions about market structure preferences and technology see jan tinbergen 1956 sherwin rosen 1974 and dennis epple 1987 for contributions to this literature while the theory is well formulated and delivers some elegant analytical results the empirical content of the model is under debate it is widely believed that hedonic models fit in a single market are fundamentally underidentified and that any empirical content obtained from them is a consequence of arbitrary functional form assumptions the problem of identification in hedonic models is a prototype for the identification problem in a variety of economic models in which agents sort on unobservable to the economist characteristics models of monopoly pricing michael mussa and sherwin rosen 1978 robert wilson 1993 and models for taxes and labor supply james heckman 1974 sorting is an essential feature of econometric models of social interactions see william brock and steven durlauf 2001 in this paper we address the sorting problem in hedonic models nesheim 2001 extends this analysis to a model with peer effects in this paper we note that commonly used linearization strategies made to simplify estimation and justify the application of instrumental variables methods produce identification problems the hedonic model is generically nonlinear it is the linearization of a fundamentally nonlinear model that produces the form of the identification problem that dominates discussion in the applied literature linearity is an arbitrary and misleading functional form when applied to empirical hedonic models our research establishes that even though sorting equilibrium in a single market implies no exclusion restrictions the hedonic model is generically nonparametrically identified instrumental variables and transformation model methods identify economically relevant parameters even 1 without exclusion restrictions multimarket data widely viewed as the most powerful source of identification achieves this result only under implausible assumptions about why hedonic functions vary across markets

evaluation of the profitability of quality labels in rural tourism accommodation a hedonic approach using propensity score matching abstractin recent years quality labels for the spanish tourism sector have been developed as part of a competitive strategy focused on the differentiation of the product given this development it is interesting to analyse the profitability of quality labels for the accommodation owners and managers in particular this article calculates the profitability of a rural tourism quality label through the use of the hedonic price approach the market valuation of the quality label for rural self catering cottages is obtained this valuation is subsequently compared with the expenses incurred by establishments in achieving the quality label in order to address the usual methodological problems associated with the endogeneity prior to application of the hedonic approach the propensity score matching is used the results indicate that possessing a quality label has a positive impact on the profitability of rural tourism

international trade and the environment policy reform in a polluted small open economy abstract this paper investigates sufficient conditions for welfare improving policy reforms in a small open economy facing many trade and pollution distortions we investigate and compare reform in tax regimes quota regimes and mixed regimes where some pollutants are regulated with taxes and others with quotas it is also shown that the welfare benefits of reforming pollution policy are greater in an economy with international factor mobility than in an economy not subject to such mobility

can coasean bargaining justify pigouvian taxation the fact that according to the celebrated coase theorem rational parties always try to exploit all gains from trade is usually taken as an argument against the necessity of government intervention through pigouvian taxation in order to correct externalities however we show that the hold up problem which occurs if non verifiable investments have external effects and parties cannot be prevented from always exploiting ex post gains from trade through coasean bargaining may be solved by government intervention in this sense the impossibility of ruling out coasean bargaining after investments are sunk may in fact justify pigouvian taxation

optimal redistribution with productive social services publicly provided private goods are conventionally considered consumer goods departing from this perspective we analyze the public provision of inputs that improve household productivity e g education and childcare in a two class economy with distorting taxation public provision is always welfare improving with respect to pure taxation given that the public input directly affects household productivity moreover the case for public provision strengthens as households heterogeneity in input demand fades out contrary to consolidated results in the literature the features of optimal provision schemes depend on the nature of publicly provided input namely if it substitutes household productive capacity or just helps households to exploit it

minimum wage legislation and unemployment insurance as instruments for redistribution the use of minimum wages and unemployment insurance as instruments for redistributing income is analyzed the government is assumed to be able to implement an optimal income tax in an economy consisting of two types of individuals who differ in ability the effect of introducing a minimum wage which induces involuntary unemployment will be to improve social welfare under weak conditions circumstances under which combining unemployment insurance with the minimum wage will be welfare improving are also considered

complementarity and the measurement of individual risk tradeoffs accounting for quantity and quality of life effects this paper considers the factors responsible for differences with age in estimates of the wage compensation an individual requires to accept increased occupational fatality risk we derive a relationship between the value of a statistical life vsl and the degree of complementarity between consumption and labor supplied when health status serves as a potential source of variation in this relationship our empirical analysis finds that variations in an individual s health status or quality of life and anticipated longevity threats lead to significant differences in the estimated wage risk tradeoffs we describe how extensions to the specification of hedonic wage models including measures for quality of life and anticipated longevity threats help to explain the diversity in past studies examining how the estimated wage risk tradeoff changes with age

explaining service price differences in international comparisons this paper reexamines observed international differences in the price of services and the positive correlation of these with per capita gdp differences using a general trade model with a nontraced sector the authors find that differences in countries factor endowments populations trade policies and trade balances will have ambiguous and sometimes opposite effects on their service prices and real incomes estimating the service price equation using recent data suggests that larger endowments of agricultural land minerals and capital larger trade deficits and higher prices for tradables increase service prices conversely larger populations and labor forces reduce service prices copyright 1991 by american economic association

fixed price controls and ad valorem distortions in an open economy abstract this paper compares the welfare effects of ad valorem and fixed price distortions for an open economy in the case of export protection domestic factor growth is much more likely to be immiserizing when fixed price distortions are used in contrast fixed price protection to an import substitute is less likely to induce immiserization via factor growth than ad valorem protection

the optimal public provision of private goods abstract this paper sets out conditions for the optimal public provision of in kind transfers rules are derived governing their marginal and optimal use in the presence of linear taxes because of the difficulty of using these conditions to examine what impact optimal transfers would have on optimal tax systems a simple two good simulation model is used to illustrate the problem

large cash transfers to the elderly in south africa we examine the social pension in south africa where large cash sums about twice the median per capita income of african households are paid to people qualified by age but irrespective of previous contributions we present the history of the scheme and use a 1993 nationally representative survey to investigate the redistributive consequences of the transfers documenting who receive the pensions their levels of living and those of their families we also look at behavioural effects particularly the effects of the cash receipts on the allocation of income to food schooling transfers and savings in south africa a large social pension about twice the median per capita income of african households is paid in cash to people qualified by age irrespective of previous contributions we present the history of the scheme and explain how such large transfers could come about in an economy in which the recipients were not only politically weak but without any political representation whatsoever we then use a 1993 nationally representative survey to investigate the redistributive consequences of the transfers documenting who receive the pensions their levels of living and those of their families we also look at behavioural effects particularly the effects of the cash receipts on the allocation of income to food schooling transfers and savings the pressing policy issue for south africans is whether it makes sense to target seven billion rand nearly 2 billion of social expenditure through the current pension schemes our analysis contributes to the discussion by documenting the redistributive and behavioural effects of the transfers we find that at least as far as immediate incidence is concerned and without allowance for behavioural effects the social pension is an effective tool of redistribution and that the households it reaches are predominantly poor because so many of the elderly among south africa s african population live with children the social pension is also effective in putting money into house

domestic distortions and international trade in this paper we develop techniques for measuring the trade policy equivalent of domestic distortions using a distance function approach our measure the trade restrictiveness index is shown to equal the uniform tariff which is welfare equivalent to a given pattern of domestic taxes and subsidies we extend the index to incorporate taxes in markets for nontraded goods and factors of production and illustrate its operationality with an application to liberalisation in mexican agriculture we conclude that our index has considerable potential in empirical work and as an aid to trade negotiators it is widely appreciated that government policies of a purely domestic nature can have major implications for a country s international trade to give just one example such implications were widely discussed in the context of the recent gatt round in which u s negotiators insisted that intra ec agricultural policy should be viewed as trade distorting however analysts and negotiators have not hitherto had access to a conceptual framework which would allow the trade effects of domestic policies to be measured in a consistent way in this paper we propose such a framework and show how it may be implemented empirically of course other attempts have been made to quantify the overall distortionary effects of domestic policies these have involved constructing empirically based indexes such as producer or consumer subsidy equivalents 2 however such measures have no theoretical foundation moreover since they use the shares of different sectors in production or consumption as weights they are likely to be systematically biased for example sectors whose output levels are reduced by high taxation are assigned low weights whereas their true weights should be higher by contrast we show below that our approach is based firmly on welfare economics and correctly uses marginal rather than average production and consumption shares as weights the approach we propose draws on recent work by two of the authors anderson and neary 1990 1992b which dealt with trade distortions only that work developed a scalar index the trade restrictiveness index or tri which equals the equiproportionate rate of trade restriction which is equivalent in welfare terms to

import restrictions capital taxes and welfare this paper develops a two good small country general equilibrium model with trade restrictions i e a tariff an import quota or a voluntary export restraint ver inter national capital mobility and taxes on the rate of return to capital within this context it examines the price and welfare effects of capital taxes the second best policy towards capital in the presence of such trade restrictions and the welfare implications of trade liberalization in the presence of capital taxes the analysis demonstrates among other things that i the optimal policy towards capital is a zero tax when imports are quota constrained and is a tax under a tariff and a subsidy under a ver when the imported good is capital intensive and that ii an asymmetry exists between trade and capital movements liberalization under the various trade regimes

input tariffs duty drawbacks and tariff reforms abstract this paper provides a systematic analysis of the effects of input tariffs and duty drawbacks on welfare the paper arrives at two broad conclusions first tariffs on inputs unaccompanied by duty drawbacks on exports have an ambiguous effect on welfare second increases in tariffs on inputs complemented by full duty drawbacks are welfare improving up to a point provided goods exhibit substitutability in production as well as consumption the latter conclusion is reinforced by the presence of a revenue constraint

on the theory of piecemeal tariff reform the case of pure imported intermediate inputs what is the effect of a tariff reduction that applies only to a subset of commodities subject to tariffs this important question was addressed systematically for the first time by james meade 1955 ch 13 in his classic work trade and welfare after a careful analysis meade concluded t here is more likely to be a gain in economic welfare if the rate of duty is high on the primary imports which will come in in increased volume and is low on the secondary imports which will come in in reduced volume p 208 this result was proved formally by trent j bertrand and jaroslav vanek 1971 who demonstrated that in a small open economy if the highest tariff rate is reduced to the next highest one welfare will rise provided the import demand for the good with the highest tariff exhibits gross substitutability with respect to all other goods 2 subsequently following a different strand of the literature as exemplified in john green 1961 tatsuo hatta 1973 1977 and peter lloyd 1974 independently proved similar results in terms of hicksian substitutability 3 in deriving their results bertrand and vanek allowed for the use of final goods as intermediate inputs i e interindustry flows 4 however neither they nor the subsequent writers including hatta and lloyd allowed for the existence of pure imported intermediate inputs that are not produced domestically therefore a natural question is whether the piecemeal policy prescription derived by them remains valid in the presence of pure imported intermediates this question is particularly important for developing countries for two reasons first by far the bulk of the imports of developing countries are intermediate and capital goods according to the world bank during the period 1975 1985 50 percent of developing countries imports were accounted for by intermediate inputs and an additional 30 percent were capital goods a sizable proportion of both capital and intermediate goods are neither produced nor directly consumed in these countries second the meade bertrand vanekhatta lloyd result has been the cornerstone of trade policy reform in many developing countries especially during the last decade in most countries trade reform has been based on the so called concertina approach under which the highest tariffs are reduced to the next highest ones and then to the next highest ones and so on thus lopez professor department of agricultural and resource economics university of maryland college park md 20742 and consultant trade policy division world bank 1818 h street n w washington dc 20433 panagariya senior economist trade policy division world bank 1818 h street n w washington dc 20433 and professor department of economics university of maryland college park md 20742 the findings interpretations and conclusions in this paper are entirely those of the authors they do not necessarily represent the views of the world bank its executive directors or the countries they represent the authors are indebted to two referees and tatsuo hatta for valuable comments on an earlier draft iin this quotation primary imports refers to the goods on which tariffs are reduced while secondary imports refers to other importables subject to tariffs 2robert lipsey and kelvin lancaster 1956 had proved the basic result of bertrand and vanek in a one factor three good model with a cobb douglas utility function 3more recently takashi fukushima 1979 has proved the validity of the hatta lloyd result when the highest tariff is shared by several commodities while rodney falvey 1988 has done the same in the presence of quantitative restrictions on imports 4although hatta 1973 1977 did not allow explicitly for interindustry flows his results can also be shown to be valid in the presence of such flows

quotas and the second best abstract this note makes two observations about trade restrictions on subgroups of commodities first unlike tariffs unalterable quotas provide no second best justification for general restrictions second the optimal allocation of intra subgroup trade depends on the form of restraint imposed

distributional consequences of rural food levy and subsidized urban rations abstract governments in many developing countries have imposed food levies on farmers to provide subsidized food to urban consumers the resulting price discrimination between individuals has general equilibrium effects so that the welfare consequences of such a policy for different socio economic groups have been controversial we relate the distributional consequences to the parameters of the economy and identify systematic relationships among different partitions of the outcomes we show for instance that if the policy helps hurts richer city dwellers then it hurts helps poorer farmers

estimating labour supply disequilibrium with fixed effects random coefficients regression long term contracting adjustment costs or efficiency wages can make a worker supply fewer more hours than desired at the current economic opportunity set a regression model with cross correlated random coefficients is used to obtain new theoretically based measures of the direction and relative intensity of labour supply disequilibrium among prime aged male hourly paid workers in the united states during 1978 82 evidence of widespread underemployment is found among primeaged male salaried workers some overemployment appears regressions incorporating person specific fixed effects are consistent with a life cycle labour supply model for salaried workers and suggest a need for fresh ways to include short run labour demand forces in micro labour supply models of hourly paid workers

subsidies versus public provision of private goods as instruments for redistribution the literatures on differential commodity taxes and on quantity controls to supplement income taxation have developed separately this paper combines these two strands in the standard framework of optimal non linear income taxation we use a model with two types of households where the government has access to both subsidy policy and public provision of a good substitutable for leisure and households can supplement the publicity provided good from the market we present conditions under which policy should involve one or both of these two instruments alongside income taxation the model is extended to many ability types

optimal minimum wage policy in competitive labor markets this paper provides a theoretical analysis of optimal minimum wage policy in a perfectly competitive labor market and obtains two key results first we show that a binding minimum wage while leading to unemployment is nevertheless desirable if the government values redistribution toward low wage workers and if unemployment induced by the minimum wage hits the lowest surplus workers first importantly this result remains true in the presence of optimal nonlinear taxes and transfers in that context a binding minimum wage enhances the effectiveness of transfers to low skilled workers as it prevents low skilled wages from falling through incidence effects second when labor supply re sponses are along the extensive margin only the co existence of a minimum wage with a positive tax rate on low skilled work is always second best pareto ineffcient a pareto improving policy consists of reducing the pre tax minimum wage while keeping constant the post tax minimum wage by increasing transfers to low skilled workers and financing this reform by increasing taxes on higher paid workers overall our results imply that the minimum wage and subsidies for low skilled workers are complementary policies pa

the genealogy of modern theoretical public economics from first best to second best abstract the development of second best modelling in the seventies has shaped modern theoretical economics the paper discusses some key changes in the economists conceptions the first two sections examine the efficiency equity dilemma the study of non convexities has shown that counterintuitive efficiency enhancing income redistribution might occur the introduction of asymmetric information has shed doubts on virtues of lump sum compensation the last sections focus on the intricate geometry of second best optimisation and the ambiguous value of the signals provided by the price system outside a first best world

in kind versus cash transfers in the presence of distortionary taxes in kind transfers can pareto dominate cash transfers as a means of income redistribution if in kind transfers and leisure are hicks substitutes and leisure is a normal good the result holds when redistributive instruments also include a linear income tax the paper proves that if the poor receive more in kind transfers and the rich less than what they would choose for themselves then compared to cash transfers there will be a higher labor supply by the poor a lower labor supply by the rich and higher levels of aggregate pre tax income and tax revenues

carbon motivated border tax adjustments old wine in green bottles 1285 ben lockwood and john whalley we discuss emerging proposals for border tax adjustments btas to accompany commitments to reduce carbon emissions in the eu the us and other oecd economies the rationale offered for such border adjustment is that various entities such as the eu if making commitments to reduce emissions which go beyond those undertaken in other regions of the world impose added costs on domestic producers which create a competitive disadvantage for them some form of remedy is viewed as reasonable to maintain the competitiveness of domestic industries when responding to global environmental problems in this paper we argue that despite its current carbon manifestation the issue of border tax adjustments and both their rationale and their effects on trade are not new and despite the present debate which seems to overlook older literature have arisen before earlier debate on border tax adjustments occurred at the time of the adoption of the value added tax vat in the eu as a tax harmonisation target in the early 1960s but academic literature of the time showed that a change between origin and destination basis in the vat would be neutral and hence the use of a destination based tax in the eu to accompany the vat offered no trade advantage to europe here we argue that essentially the same arguments also apply for carbon motivated btas and in the current debate there seems to be a misconception between price level effects and relative price effects stemming from a bta which needs correcting we also argue that the impact of border tax adjustments should be viewed as independent of the motivation of the adjustments

in kind transfers cash grants and the supply of labour abstract this paper corrects the notion that somehow benefits given in kind interfere less with the work leisure choice than cash grants of equivalent monetary value in a simple model the analysis proves that the true effect depends on the extent of the in kind transfer and the substitutability of the good in question with leisure

valuing school quality better transport and lower crime evidence from house prices housing prices within urban areas exhibit highly localized variation that cannot be explained solely by differences in the physical attributes of dwellings we consider the role of local amenities and disamenities in generating price variation within urban areas focusing on three highly policy relevant urban issues transport accessibility school quality and crime our survey of the recent empirical literature highlights what is known and what is not known on these issues and considers the relevance and reliability of this evidence for policy design and evaluation although there are serious empirical challenges we argue that research on housing values based on careful research designs can offer credible estimates of the social value of place specific attributes and amenities

patent replacement and welfare gains abstract patents were chosen in an era when modern public finance tools were unavailable the same innovation outcomes can be achieved with higher welfare if patent elements are replaced by modern features this paper constructs two theoretical models of product innovation and simulates the welfare effects of replacing patents with an intertemporal bounty arrangement we find that replacing patents with this alternative has the potential to increase welfare in the united states through reform of pharmaceutical patents by 43 9 194 billion when measured in present value terms this is 0 3 1 3 of annual gdp based on simulations involving four selected drug sectors the potential to increase welfare would be higher if applied to the larger sector of drugs as a whole in principal patents could be replaced in other sectors as well

variety and size regulation in discrete choice oligopoly imperfectly competitive markets for a differentiated product may underprovide brand variety when consumer tastes for brands are highly heterogeneous we show that when the brands in question are indivisible in consumption and each consumer buys a customized quantity or size of the preferred brand only a welfare improvement can be obtained by regulating the size of purchase we study neutral size regulation which requires that the size of purchase be set equal to the size that would prevail in the absence of regulation this improves brand variety and consumer surplus provided consumer tastes are sufficiently heterogeneous

minimum wage legislation as a second best policy mass unemployment is a striking phenomenon of the present economic situation of european market economies although the profession of economists has been criticized for not providing satisfactory cures it has produced a number of different explanations either complementary or contradictory for the occurrence of mass unemployment in this paper we examine the argument that unemployment is the consequence of minimum wage legislation which is socially desirable the observation of current wage legislations suggests that the above argument is broadly at least partly accepted by policy makers curiously enough a defence of this argument meeting the rigorous requirements of modern theory seems to be missing symmetrically attacks against minimum wage legislation often rely upon reasonings of dubious relevance i e the obvious remark that unemployment is a waste with first best efficiency criteria the present paper proposes a second best analysis where second best stems from informational asymmetries which prevent the implementation of lump sum transfers needed for a first best redistribution policy the question under scrutiny can be reformulated in a more precise way as follows does a second best optimal redistribution policy lead to minimum wage legislation and unemployment our elements of answer are gathered in 3 sections in section 2 the principles of the analysis of the desirability of quantity controls and existing results are recalled in section 3 the analysis of section 2 is specified to a simple prototype model for the study of linear income taxation in section 4

tariff reform in the presence of sector specific distortions the problem of choosing second best trade policies is modified by including sector policies as well as tariffs formulae for the optimal tariff and sector specific subsidy are derived and used to study the design of optimal policy menus the theory is applied to a computable general equilibrium model of the u s economy which emphasizes agriculture the model suggests that non agricultural distortions do not provide a second best argument for substantial levels of agricultural protection reforme tarifaire quand il existe des distorsions specifiques a un secteur le probleme du choix de politiques commerciales de second ordre est modifie quand on inclut des politiques specifiques a un secteur tout autant que les tarifs douaniers les auteurs derivent les formules pour le tarif optimal et pour la subvention sectorielle optimale et les utilisent dans l etude de la construction des menus de politiques optimales ils appliquent la theorie a un modele calculable d equilibre general de l economie des etats unis qui met l accent sur le secteur agricole le modele suggere que des distorsions dans les secteurs non agricoles ne fournissent pas un argument de second ordre qui supporterait des niveaux de protection substantiels pour le secteur agricole

welfare effects of aid under quantitative trade restrictions the paper examines the effects of tied aid on the welfare of both the donor and the recipient countries we depart from the previous literature by assuming preexistence of quantitative trade distortions to mitigate these distortions the donor country provides aid that is tied to the rationed good conditions for the presence of the transfer paradox and of the enrichment of both countries are derived and interpreted under the stability of the system furthermore we show that whereas untied aid cannot increase global welfare tied aid unambiguously does so

assigning resources to budget constrained agents this article studies different methods of assigning a good to budget constrained agents schemes that assign the good randomly and allow resale may outperform the competitive market in terms of utilitarian efficiency the socially optimal mechanism involves random assignment at a discount an in kind subsidy and a cash incentive to discourage low valuation individuals from claiming the good copyright oxford university press

pace sequencing and credibility of structural reforms abstract this paper reviews the theory and empirical evidence on the main policy issues relating to the pace credibility and sequencing of structural reforms in less developed countries and post socialist economies it highlights areas where there is broad consensus as well as widespread disagreement among policymakers and economists pointing out along the way areas where more research would be useful

multilateral policy reforms and quantity restrictions on trade abstract we specify a many nation many commodity model of international trade involving tariff and quota distortions we derive conditions for the existence of strict pareto improving multilateral reforms of quotas and obtain recommendations for specific directions of such quota reforms given a mild rank condition on the world trade matrix all directions of quota reform that attain a strict pareto improvement using international lump sum compensation remain strict pareto improving even without lump sum compensation provided that the quota reform is accompanied by a multilateral reform of tariffs the precise nature of the tariff reform that accomplishes the redistribution task is determined

comment on j p neary pitfalls in the theory of international trade policy concertina reforms of tariffs and subsidies to high technology industries peter neary makes three points in his discussion of subsidies to hightechnology industries first the standard brander spencer one period duopoly model does not provide an argument for subsidies to high technology industries there is nothing in the model that identifies the firms as high tech if anything the fixed and small number of firms is a description of any industry with high barriers to entry low tech as well as high tech second the brander spencer three period duopoly model does capture an important feature of high technology industries namely substantial initial investment in r d in the model the government decides first about taxes or subsidies to the domestic firm s r d and output or price the firm invests in r d in the first actually second period which has a strategic effect on its rival both in the first and second period when production takes place but it turns out that the three period model is plagued by the same kind of ambiguity as the one period model only doubly so when second period actions are strategic substitutes the firm overinvests in the first period to give it a strategic advantage in the second period the welfare maximizing policy is to subsidize output in the second period and tax r d in the first when second period actions are strategic complements policies should be the opposite third when r d has positive spillovers to other firms domestic and foreign a subsidy is called for to prevent underinvestment by the domestic firms thus there may be reasons to tax and to subsidize r d at the same time which makes for even more ambiguity i would like to add to the ambiguity concerning subsidies to hightechnology industries by investigating the effects of subsidies under other assumptions about market structure and conduct nothing in what i have to say is new but a serious consideration of the potential for public policy must be broader in scope than the market structure of two firms no domestic consumption and strategic interaction consider first the case of perfect competition a subsidy to exports is

market size and substitutability in imperfect competition a bertrand edgeworth chamberlin model competition is often associated with the idea that there are many traders in the market or that each price maker is small as compared to the market this paper introduces this notion of market size in a model of price competition with imperfect substitutes by constructing a model which creates a bridge between the chamberlin and bertrand edge worth lines of work on price competition we investigate the role of two fundamental parameters in the existence of an equilibrium the market size given by the number n of competitors and the degree of substitutability we prove that a for a given number of n 2 of competitors a sufficiently large but finite degree of substitutability entails nonexistence this thus generalizes the bertrand edgeworth nonexistence result which applies only to perfect substitutes b conversely for a given upper bound on the degree of substitutability a sufficiently large number of competitors ensures existence which thus introduces a significant role for market size in models of imperfect competition we finally investigate the proximity of an equilibrium when it exists to a competitive outcome and we find that both high substitutability and large market size are a condition for competitiveness

shadow prices and public policies in a disequilibrium model of an open economy the paper focuses on the interaction between the goals of optimal stabilization and of allocative efficiency in project evaluation in an economy that is small as an exporter which must maintain trade balance and where some disequilibrium may prevail on goods and labour markets the criteria that are developed reflect an aggregation of profitability and reduction of unemployment additional foreign demand foreign currency savings should be evaluated in welfare terms after weighting by the gap between the relevant market and shadow prices the shadow prices also lead to the definition of an optimal taxation system

public economics and the theory of public policy when james mirrlees and william vickrey were awarded the nobel prize in economics last year it marked only the third time that the award had gone to scholars of public sector economics in contrast to the reception given to the previous two winners ronald coase and james buchanan the news was greeted with some bewilderment by policy specialists once removed from the academic literature who are mirrlees and vickrey and what have they done that has been of lasting benefit to the study of public economics let alone of practical benefit to policy makers this seems to me to be a fair question coase after all had set out a conceptual approach to the study of externalities and transaction costs that has become an implicit part of the methodological baggage carried around by policy economists and policy makers alike buchanan was in part responsible for the welcome emphasis on institutions in public sector decision making and for insisting that politicians bureaucrats and voters are human beings with human motives the legacy of mirrlees and vickrey is less well known but i would argue it is every bit as profound their approach to the theory of economic policy which is grounded on the importance of imperfect information as a constraint on public policy has changed the very nature of public economics research and of its implications for economic

trade reform with quotas partial rent retention and tariffs quotas are the predominant means of protection in developed countries with quota rents commonly shared between exporter and importer this paper derives shadow prices appropriate to evaluating trade reform under these circumstances and provides a number of useful sufficient conditions for welfare improving piecemeal reform in doing so the authors apply the distorted quantity constrained expenditure function and use implicit separability to derive more powerful results than have previously been available

welfare implications of growth under quotas abstract using the standard trade model it is shown that growth under quotas always improves welfare this result is contrary to johnson s 1967 result on the possibilities of immeserizing growth in the presence of tariffs

the global efficiency of radial tax reductions existing results on the efficiency consequences of a radial reduction in all tax and subsidy distortions in a small competitive open economy are extended by using revealed preference theory to analyze finite changes rather than infinitessimal changes and to allow both for the endogenous determination of which goods are imported which exported and which nontraded and also for the possibility that a finite policy change may cause switches of particular goods among these three categories copyright 1991 by economics department of the university of pennsylvania and the osaka university institute of social and economic research association

identifying sorting in theory assortative matching between workers and rms provides evidence of the complementarities or substitutes in production the presence of complementarities is important for policies that aim to achieve the optimal allocation of resources for example unemployment insurance we argue that using wage data alone it is virtually impossible to identify whether assortative matching is positive or negative even though we cannot identify the sign of the sorting we can identify the strength i e the magnitude of the cross partial and the associated welfare loss we show rst that the wage for a given worker is non monotonic in the type of his employer this is due to the fact that in a sorting model wages reect the opportunity cost of mismatch we show analytically that this non monotonicity prevents standard rm xed eects to correlate with the true type of the rm we then propose an alternative procedure that measures the strength of sorting in the presence of search frictions knowing the strength of sorting facilitates the measurement of the output loss due to mismatch

recent developments in multilateral policy reform theoretical work on the reform of tariffs and quantity restrictions on trade has been focused on deriving recommendations for pareto improving changes in policy as in the optimal closed economy tax reform literature e g diewert 1978 there has been an emphasis on coming up with simple answers to practical policy questions which way is up and checkable evaluation criteria for policy reform proposals the literature on tariff and quota reform can be divided into two subsets the first deals with policy reform in a single usually small country unilateral policy reform and the second considers reforms in a many country world multilateral policy reform on unilateral policy reform concerning tariffs we refer the reader to foster and sonnenschein 1970 bertrand and vanek 1971 hatta 1977 smith 1980 diewert turunenred and woodland 1989 1991 and vousden 1990 ch 9 and concerning quotas to falvey 1988 anderson and neary 1992 neary 1995 and vousden 1990 ch 9 two broad policy conclusions emerge from this literature under various assumptions proportional reductions of all tariffs and reductions of extreme ad valorem tariffs can be welfare improving also for unilateral changes relaxations of binding quotas with no tariffs and relaxations of quotas with extreme quota premia when tariffs are present and goods are net substitutes can produce welfare gains the second and smaller subset of the international trade literature deals with multilateral changes early contributions extend the broad policy conclusions of the unilateral literature to a many country world but suffer from stringent assumptions such as requirements that all commodities should be net substitutes or that all goods should be normal turunen red and woodland 1991 offer a generalization of the unilateral rule for proportional tariff reforms i e that in each country tariffs should be altered proportionally to a vector of suitably defined shadow prices and

repeated interaction and the public provision of private goods the literature suggests that governments can use in kind transfers to design efficient and targeted redistribution schemes if individual incomes are not directly observable we investigate the extent to which the self selection property of in kind transfers carries through if redistributive transfers are made repeatedly in a two period setting the government may gain information about the individuals incomes in the first period and exploit this information for making targeted transfers in the second period this however also triggers changes in the individuals behavior if the government can commit to its future policy the least cost policy may involve randomization between cash and in kind transfers without commitment the dynamic setting works against the government s interest it may no longer be able to use in kind transfers to generate information about the individuals types jel classification h42 h2

agglomeration economies and productivity a structural estimation approach using commercial rents we gain more insight into the heterogeneity in firms productivity regarding agglomeration economies given a production function that allows for input factor substitution we identify ratios of firm specific production parameters employing a hedonic price approach we use unique microdata of commercial rents and firm characteristics and employ semiparametric estimation techniques the results show that agglomeration economies capitalize in commercial rents nevertheless expenditure on agglomeration is in general limited for example it is on average only 5 3 of expenditure on office floor space it is much higher in some sectors for retail firms it is about 20 of the expenditure on floor space 2013 the london school of economics and political science

is an integrated farm more resilient against climate change a micro econometric analysis of portfolio diversification in african agriculture abstract this paper examines whether an integrated farm that owns both crops and livestock is more resilient under global warming than a specialized farm in crops using around 9000 farm surveys across africa we explore how farmers choose one of the farm types and how the net revenue of each type varies across the range of climate in africa the results indicate that an integrated farm increases in number while a specialized farm decreases across africa under climate predictions for 2060 the relative profitability of each system against each other also changes an integrated farm becomes relatively more profitable over specialized farms half a century from now the impacts of climate change on integrated farms range from 9 loss to 27 gain depending on climate scenarios behavioral models can capture portfolio diversification benefits that agro economic models cannot measure

pollution content tariffs environmental rent shifting and the control of cross border pollution this paper considers the optimal unilateral policy for a country that imports a good from a neighbouring country and is harmed by pollution generated during the production of that good if the foreign country has a variable abatement technology then home has an incentive to impose a tax on the pollution content of imports a pollution content tariff foreign regulation of pollution does not eliminate home s incentives to intervene but instead may create rent shifting opportunities by making the right to pollute a scarce asset foreign pollution quotas create rents that the home government can try to extract

hedonic prices and implicit markets estimating demand and supply functions for differentiated products in choosing the level of quality to purchase the buyer of a differentiated product also chooses a point on the marginal price schedule for that product hence in general the demand functions for product characteristics cannot be consistently estimated by ordinary least squares market equilibrium results in a matching of characteristics of demanders and suppliers this matching restricts the use of buyer and seller characteristics as instruments when estimating demand and supply functions for product characteristics the paper develops these issues a stochastic structure for hedonic equilibrium models is then proposed identification results are presented and estimation procedures are outlined

on the hatta normality condition and tax reforms abstract the role of the hatta normality condition in the tax reform literature is discussed it is shown that in a one consumer economy the hatta normality condition only pertains to the directions of welfare improving tax reforms but has no role in determining the existence of such reforms in a many consumer economy the hatta normality condition is shown to affect both the existence and directions of strict pareto improving tax reforms it is also shown that the hatta normality condition can be used to indicate optimality or suboptimality of the economy s initial choice of lump sum transfers

effective demand enterprise reforms and public finance in china economic reform in china athar hussain and nicholas stern this paper examines some problems of transition from a command to a market economy through an analysis of the most important example to date the reforms in the chinese economy since the late 1970s our focus is on the links between enterprise reforms effective demand and public finance the reforms have created a curious and problematic hybrid of market and command economies with serious problems of coordination they have concentrated almost exclusively on the delegation of decision making to enterprises from the higher to lower tiers of the government without taking into account its implications for investment consumption and public finance an understanding of future policy and lessons for other countries requires a careful examination of the effects of these past policies granting discretion to enterprises over investment and wages has resulted in both an investment and consumption boom but paradoxically a fall in profits there are strong reasons to suppose that the investment ratio has been too high in recent years fuelling inflation and slowing additions to supply by prolonging the gestation period of investment there has been a large increase in liquid assets in the hands of households which makes their expectations increasingly important for macroeconomic policy there is need for concerted financial innovation to diversify household wealth away from liquid assets finally the changes in the composition of government revenue and expenditure are disturbing there is an urgent need for a flexible and broad based tax system and for reducing price subsidies and subsidies to loss making enterprises