variable returns to scale in production and patterns of specialization this paper discusses some trade and welfare implications of the two sector model based on increasing returns to scale irs in one industry and decreasing returns to scale drs in the other it has been shown by horst herberg and murray kemp that given homothetic production functions with irs in one industry and drs in the other the production possibilities frontier ppf is strictly concave to the origin near the irs axis and strictly convex to the origin near the drs axis while this result constitutes an important finding and is contrary to the general impression among economists even twelve years after the publication of herberg and kemp s paper no attempt has been made to analyze its implications for welfare and patterns of specialization in this paper i consider a simple twocommodity model with irs in one industry and drs in the other and discuss some interesting implications of variable returns to scale vrs first i demonstrate that in this model if a small open economy specializes completely in production it will do so in the drs commodity and not in the irs commodity as is generally believed second if at a given price ratio an internal production equilibrium exists a welfaremaximizing small open economy will never specialize completely in production even though the ppf exhibits decreasing opportunity costs over a part of its range third given output generated economies and diseconomies of scale welfare maximization for a small country requires a permanent tax subsidy scheme encouraging expansion of the irs industry and contraction of the drs industry finally in a two country model with identical tastes and technology across the countries free trade equilibrium may result in incomplete specialization by the exporter of the irs commodity and complete specialization by the exporter of the drs commodity in the course of the analysis i argue that tinbergen s formulation of frank graham s case for protecting the irs industry is incorrect i then present a possible reformulation of it in section i the basic production model is introduced in section ii the model is analyzed and in section iii it is argued that all the results continue to hold in the multifactor case

estimation of production technology when the objective is to maximize return to the outlay abstract this paper deals with estimation of production technology where endogeneous choice of input and output variables is explicitly recognized to address this endogeneity issue we assume that producers maximize return to the outlay we start from a flexible translog transformation function with a single output and multiple inputs and show how the first order conditions of maximizing return to the outlay can be used to come up with an estimating equation that does not suffer from the econometric endogeneity problem although the output and input variables are chosen endogenously this is because the regressors in this estimating equation are in ratio forms which are uncorrelated with the error term under the assumption that producers maximize return to the outlay the analysis is then extended to the multiple outputs and multiple inputs case with technical inefficiency although the estimating equations in both single and multiple output cases are neither production nor distance functions they can be estimated in a straightforward manner using the standard stochastic frontier technique without worrying about endogeneity of the regressors thus we provide a rationale for estimating the technology parameters consistently using an econometric model which requires data on only input and output quantities

global warming technological change and trade in carbon energy challenge or threat is it possible to combat global climate change through north to south technology transfer even without a global climate treaty or do carbon leakage and the rebound effect imply that it is possible to take advantage of technological improvements under the umbrella of a global arrangement only for answering these questions two possible states of the world are discussed one where more energy efficient technologies are transferred unconditionally from the north to the south and where regions do not cooperate in the solution of the global climate problem but unilaterally decide on climate policies and technology transfers one where the north to south technology transfer is tied to the requirement that the south in some way contributes to the solution of the global climate problem rebound and leakage effects hinder a sustainable and welfare improving solution of the climate problem

valuing school quality using boundary discontinuities abstract existing research shows that house prices respond to local school quality as measured by average test scores however higher test scores could signal higher academic value added or higher ability more sought after intakes in our research we show that both school value added and student prior achievement linked to the background of children in schools affect households demand for education in order to identify these effects we improve the boundary discontinuity regression methodology by matching identical properties across admissions authority boundaries by allowing for boundary effects and spatial trends by re weighting our data towards transactions that are closest to district boundaries by eliminating boundaries that coincide with major geographical features and by submitting our estimates to a number of novel falsification tests our results survive this battery of tests and show that a one standard deviation change in either school average value added or prior achievement raises prices by around 3

environmental policy with endogenous plant locations in a game between the governments of two countries each chooses its own environmental policy the nash equilibria of the game are generally not pareto optimal on the one hand each country may want to attract industry giving it an incentive to choose low environmental taxes or standards on the other hand if disutility from pollution is sufficiently high each country might prefer that a firm locates only in other countries this effect tends to make the environmental policy under non cooperation stricter than it would be with cooperation

innis lecture environmental crises past present and future environmental crises are distinguished by rapid and largely unexpected changes in environmental quality that are difficult if not impossible to reverse examples would be major extinctions and significant degradations of an ecosystem i argue there are three preconditions for crisis failures in governance an ecological system exhibiting a tipping point and an economy environment interaction with positive feedbacks i develop a simple model to illustrate how a crisis may arise and draw on our knowledge of past and present crises to highlight the mechanisms involved i then speculate as to whether climate change is indeed a crisis in the making les crises environnementales sont caracterisees par des changements rapides et largement non anticipes dans la qualite de l environnement qui sont difficiles sinon impossibles a renverser des exemples pourraient etre des extinctions d especes et des degradations significatives d un ecosysteme l auteur suggere qu il faut trois conditions pour qu il y ait crise faillites de gouvernance un systeme ecologique au point de bascule et une interface environnement economie riche de retroactions positives l auteur developpe un modele simple pour illustrer comment une crise peut emerger et s appuie sur la connaissance des crises passees et presentes pour souligner les mecanismes en jeu on specule en fin de texte sur la question a savoir si le changement climatique est une crise en train de prendre

location choice by households and polluting firms an evolutionary approach this paper examines several policy regimes to deal with the problem of households suffering from environmental damage by firms in the same region we employ an evolutionary framework to analyze migration movements in the course of time since firms and households will not relocate immediately in response to payoff differentials we show that taxation gives firms and households an incentive to stay away from each other laissez faire compensation only gives households firms an incentive to stay away from firms households we find that taxation creates the right incentives to reach a local welfare maximum however when there are multiple local maxima circumstances may arise under which compensation leads to a better outcome than taxation c 2004 elsevier b v all rights reserved

nonconvexity induced by external costs on production theoretical curio or policy dilemma this paper considers with a degree of scepticism the sweeping policy conclusions that can be found in the theoretical literature concerning nonconvexit ies in the social production set induced by external costs on firms this literature has provided proofs of the possibility that such nonconvexit ies exist but these proofs have readily been interpreted as a basis on which to judge the advisability of policies to control external costs 2 indeed a number of authors have felt able to proceed from specific theoretical examples of the existence of nonconvexity to the opinion that nonconvexity represents a general obstacle to policy one of the ma in themes will be to demonstrate that the theoretical possibility of the existence of a nonconvexity at a m icro level does not imply the existence of a m icro or a fortiori macro nonconvexity in the real world nor does it imply that any nonconvexity that does exist in reality is relevant to policy the intention is not to deny that nonconvexit ies may represent an obstacle to the efficient control of external costs in specific contexts but in order to establish the real world policy relevance of a nonconvexity it is necessary to verify its existence emp irically and to establish that it stands in a particular relationship to the no policy starting point

negative externalities and evolutionary implementation in this paper we model externality abatement as an implementation problem our model incorporates techniques from evolutionary game theory assuming that agents dynamically adjust their choices in response to the incentives they currently face we offer a simple condition on aggregate payoffs under which a planner with limited information about preferences can nevertheless ensure that efficient behaviour is globally stable finally we present a series of applications that show that our sufficient condition holds in a variety of models involving negative externalities

the enlargement of the european union effects on trade and emissions of greenhouse gases abstract with the gradual accession of various central and eastern european countries ceecs to the european union eu international trade between the eu and the ceecs will change as a result of trade liberalisation and the mobility of production factors within the eu the eu and most of the ceecs have already committed themselves to reduce by 2008 2012 their emissions of greenhouse gases ghgs by 8 compared to the 1990 level this paper reports on an investigation of the potential consequences of the enlargement of the eu and of the emission reduction target set by the kyoto protocol on the sectoral production patterns and international trade a comparative static general equilibrium model was developed to examine the impacts under different scenarios for illustrative purposes two regions the eu and the ceecs and three categories of goods and services agricultural goods industrial goods and services were included the model was calibrated by the 1998 data the model was subsequently applied to study the effects of free trade the mobility of factors and the environmental constraints on production and international trade in light of the enlargement of the eu we show that in this specific context free trade is beneficial to economic welfare and does not necessarily increase emissions of greenhouse gases the mobility of factors also increases economic welfare but in the case of fixed production technology it may harm the environment through more emissions of ghgs

buffalo hunt international trade and the virtual extinction of the north american bison in the sixteenth century north america contained 25 to 30 million buffalo by the late nineteenth century fewer than 100 remained while removing the buffalo east of the mississippi took over 100 years the remaining 10 to 15 million buffalo on the great plains were killed in a punctuated slaughter lasting little more than ten years i employ theory international trade statistics and first person accounts to argue the slaughter was initiated by a foreign made innovation and fueled by a foreign demand for industrial leather european demand and american policy failure are jointly responsible for the slaughter on the plains jel f14 n51 n71 q57

international prices costs and markup differences relative cross border retail prices in a common currency comove closely with the nominal exchange rate using product level prices and wholesale costs from a grocery chain operating in the united states and canada we decompose this variation into relative costs and markup components the high correlation of nominal and real exchange rates is driven mainly by changes in relative costs national borders segment markets retail prices respond to changes in costs in neighboring stores within the same country but not across the border prices have a median discontinuous change of 24 percent at the border and 0 percent at state boundaries jel f31 l11 l81

stochastic estimation of firm inefficiency using distance functions econometric estimation of allocative and technical efficiency has frequently been carried out using a shadow cost function and its associated share or demand equations since the problem is formulated in terms of shadow prices the effect of allocative inefficiency on input usage must be computed indirectly from input share or demand equations as an alternative approach we derive and estimate an input shadow distance system comprising the dual shadow input distance function and the price equations derived from the shadow cost minimization problem estimated shadow quantities provide direct estimates of the effect of allocative inefficiency on input usage one can also easily calculate firm and time varying technical inefficiency by decomposing the residuals we also compute returns to scale and the cost savings obtained by eliminating both types of inefficiency our approach is illustrated using a panel of u s railroads both the cost function and the distance function are valid representations of multioutput technologies the arguments of the cost function are output quantities and input prices while the arguments of the distance function are input and output quantities the input distance function measures the extent to which the firm is input efficient in producing a given set of outputs while the cost function assumes cost minimization by a firm which is input efficient the shadow cost function is a generalization of the cost function and depends on output quantities and shadow internal to the firm input prices rather than actual market input prices thus the shadow cost function assumes shadow cost minimization but not actual cost minimization this function has frequently been employed in fixed effects estimation of allocative efficiency ae and technical efficiency te an observed input vector is technically efficient if it is on the isoquant of the observed output vector an input vector is allocatively efficient if the radial contraction of the input vector to the isoquant is cost minimizing identification of parameters that measure ae can be achieved by the estimation of a shadow cost system comprising the actual cost equation and the share or input demand equations which are expressed in terms of shadow prices and output quantities shadow cost systems have been estimated by atkinson and halvorsen 1984 sickles good and johnson 1986 eakin and kniesner 1988 kumbhakar 1992 and atkinson and cornwell 1994 among others given panel data the deviation of shadow from actual input prices can be measured by price specific inefficiency parameters that may vary across firms and over time however the estimation of the effect of

estimating a non minimum cost function for hospitals hospital costs have been rigorously scrutinized by economists and health policy experts for several decades despite the large volume of research two related problems persist first although theoretical models of hospital behavior such as 9 and 10 suggest systematic deviations from cost minimization there has been little attention given to modelling and measuring this inefficiency second because cost minimization is a questionable maintained hypothesis most hospital cost research has not used cost functions that are dual to production technology consequently the technological concepts of scale and factor substitution are obscured we address these twin problems by developing and estimating a long run cost function that allows for systematic allocative inefficiency the parameter estimates we present also provide information on the traditional production concepts of scale and factor substitution as well as information on the size and source of allocative inefficiency in u s hospitals hospital services clearly comprise a large industry short term hospital expenditures were 120 billion in 1984 for example the u s short term hospital sector has increased in relative size by a factor of 2 5 since 1960 so that short term hospital expenditures are now about 3 6 percent of the gnp in the united states while industry size alone probably justifies an empirical investigation into the production technology for hospital services we are also motivated by the relevance of our findings to several health policy issues measures of scale economies are crucial in forming public policies concerning entry exit and mergers in the hospital industry yet most studies have not actually estimated the technological concept of scale elasticities of factor substitution are also technological and economic concepts that should be of interest to health policy makers these measures indicate the extent to which cost increases can be avoided by substituting away from the factor whose price has increased hospital cost estimates that do not include factor

sources of investment inefficiency the case of fixed asset investment in china abstract this study attempts to measure the inefficiency associated with aggregate investment in a transitional economy the inefficiency is decomposed into allocative and technical inefficiency based on standard production theory allocative inefficiency is measured by the deviation of actual investment from the theoretically desired investment demand institutional factors are then identified as part of the driving force of the deviation the resulting model is applied to chinese provincial panel data the main findings are chinese investment demand is strongly receptive to expansionary fiscal policies and inter provincial network effects the tendency of over investment remains even with signs of increasing allocative efficiency and improving technical efficiency

does environmental dumping lead to delocation environmental dumping is often viewed as an instrument used by some countries in the attempt to attract foreign investments stated otherwise the delocation of firms would be a major outcome of a stiff environmental policy in this paper we study the impact of a strict anti pollution policy pursued by a government on domestic firms locational decisions and determine the main variables that interact with such a policy some preliminary welfare implications are also provided

a consumption based theory of the environmental kuznets curve abstract most theories about the inverted u relationship between pollution and income termed the environmental kuznets curve ekc are production side theories emphasizing pollution and abatement technologies production side theories are implicitly based on the assumption of low factor mobility and the absence of pollution as a variable in the utility function both assumptions are called into question by the empirical evidence of ekcs for i pollutants that are long lived and not easily shiftable and ii regional cross sections with free labor mobility hazardous waste sites are a prime example this paper develops a stylized model of the ekc based on perfect mobility of households and labor it represents the first attempt at developing a consumption side model of the ekc

population mobility and transboundary environmental problems abstract a standard result in the literature on environmental economics is that efficient environmental policies regulating transboundary pollution will be adopted only if there is interjurisdictional coordination efficient policies can be adopted as a result of interregional treaties or mandated by a central authority the present paper demonstrates that if there is perfect population mobility between the regions affected by the transboundary pollution the efficient outcome is a nash equilibrium of the policy game between regional authorities this is true independently of what policies are available to the regional authorities however there may be more than one nash equilibrium so that policy coordination may be necessary in order to achieve the best equilibrium

international environmental agreements as evolutionary games this paper applies evolutionary game theory to international environmental agreements ieas contrary to stage game models barrett in j theor politics 11 519 541 1999 eur econ rev 45 1835 1850 2001 in an evolutionary equilibrium ee no signatory prefers to be outside the iea and the ee is robust to trembles with two populations there is a unique interior ee when there is decreasing returns to abatement and small asymmetry in the externality differences across populations at the interior ee transfers from the poor to the rich can increase payoffs for all nations but come at the expense of greater payoff inequality transfers can also eliminate the basin of attraction for the payoff inferior ee with decreasing returns to abatement and large asymmetry thus ieas such as the kyoto treaty predicated on the polluter pays and ability to pay principles may result in pareto inferior outcomes

north south investment flows and optimal environmental policies abstract in the context of a simple north south model that focuses on the international movement of capital we show how neglect of pollution generating effects of foreign investment may lead to distorted and misleading policy recommendations such a neglect has recently received emphasis in the empirical literature on east asian economies as in bello and rosenfeld 1990 dragons in distress asia s miracle economics in crisis food first san francisco and was shown to overlook resulting tendencies in these economies toward specialization away from agriculture and toward manufacturing our simple model formalizes this observation and allows us to show that even for an unspecialized capital poor resource rich south such pollution generating effects provide incentives for the north to encourage rather than to discourage foreign investment abroad and strengthen southern incentives to restrict foreign investment more sharply than is conventionally assumed in a nutshell it brings out the implications of northern capital creating its own demand as a consequence of its adverse impact on the southern resource base despite its simplicity the model thus sheds light on three interrelated aspects of international trading relations production asymmetry incomplete markets and monopolistic advantage

fiscal stress and the production of public safety a distance function approach abstract faced with increasing crime rates but nonincreasing budgets local governments are seeking cost saving means of providing public safety this paper investigates a bureaucracy s response to fiscal stress as well as its ability to efficiently substitute civilian for uniformed personnel exploiting duality theory a distance function is used to model technology retrieve information concerning substitutability and shadow prices of personnel and test for cost minimization morishima elasticities are adopted to allow for asymmetry in substitution between types of personnel it is found that the more adverse the public safety environment and budgetary condition the more efficiently resources are allocated

spreading versus concentrating damages environmental policy in the presence of nonconvexities abstract this paper examines the role of nonconvexities in externality control from a policy perspective nonconvexities can arise from a number of sources and can significantly alter the optimal solution to an externality problem for instance it may be socially desirable to concentrate externality damages in one area and prohibit them in another rather than spread the effects of the externality across a number of sites if this solution is optimal a pollution tax will not achieve the social optimum but a system of marketable permits will

endogenous lobby formation and endogenous environmental protection with unilateral tariff reduction this paper studies how one country s decision to liberalize trade affects the political economic structure that determines environmental policy in another country by constructing a political economy model in which the formation of lobby groups and environmental policy are endogenously determined we show that unilateral tariff reductions by a large country importing a polluting good will generate a lobby group with a relatively lower cost of organization in a small country exporting that good a formulated lobby demands an inefficient environmental policy and hence the small country s environmental regulations become less efficient then we show that when a lobby already exists unilateral tariff reductions result in the formation of a rival lobby and consequently make the small country s environmental policy more efficient

trade and transboundary pollution spatial separation reconsidered abstract copeland and taylor 1999 j int econ 47 137 168 show that trade allows the spatial separation of two incompatible industries concentrating the polluting industry in one country eliminates its degenerative effects in the other this paper extends the analysis by allowing for transboundary pollution thus specialization has indirect repercussions on the level of pollution in the other country we show i how cross national differences in exposure to pollution emissions can generate comparative advantage and ii under what condition the resulting trading pattern combined with transboundary pollution can increase pollution exposure with negative effects on productivity and welfare in both countries

output allocative and technical efficiency of banks abstract in this paper we calculate output allocative and technical efficiency for a sample of small banks operating in 1982 we do so by estimating a shephard type output distance function as a deterministic frontier in general we find that the banks in our sample are output inefficient

pollution havens and industrial agglomeration abstract this paper examines the pollution haven hypothesis using a spatial economy model of two countries and two sectors the manufacturing sector generates cross border pollution which reduces cross sectoral productivity of agricultural goods and lowers local income we derive a demand reducing effect that discourages firms to move to the country with laxer environmental regulations in the absence of any comparative advantage our analysis also demonstrates that manufacturing agglomeration forces can alleviate the pollution haven effect a pollution haven may not arise if environmental regulation is slightly more stringent in the larger country

factor endowments inequality and paths of development among new world economies whereas traditional explanations of differences in long run paths of development across the americas generally point to the significance of differences in national heritage or religion we highlight the relevance of stark contrasts in the degree of inequality in wealth human capital and political power in accounting for how fundamental economic institutions evolved over time we argue moreover that the roots of these disparities in the extent of inequality lay in differences in the initial factor endowments dating back to the era of european colonization we document through comparative studies of suffrage public land and schooling policies systematic patterns by which societies in the americas that began with more extreme inequality or heterogeneity in the population were more likely to develop institutional structures that greatly advantaged members of elite classes and disadvantaging the bulk of the population by providing them with more political influence and access to economic opportunities the clear implication is that institutions should not be presumed to be exogenous economists need to learn more about where they come from to understand their relation to economic development our findings not only contribute to our knowledge of why extreme differences in the extent of inequality across new world economies have persisted for centuries but also to the study of processes of long run economic growth past and present

dynamic instability of a mixed city in the presence of neighborhood externalities it has been often asked whether a city currently accommodating a variety of economic social and racial groups will continue to be a mixed city or will become exclusively occupied by a single group particularly poor blacks with all other groups moving out of the city in the long run in order to answer this question properly it seems essential to develop a long run dynamic model of a city with emphasis on socioeconomic factors like neighborhood externalities within or among various groups of residents as well as spatial factors like the individual choice of residential space and location it might be safely said that in the literature the only theoretical work which employs a long run dynamic approach to this kind of problem is a paper on dynamic models of segregation by thomas schelling 197 1 although his socioeconomic analysis has revealed some of the dynamic properties of a racially mixed area with neighborhood externalities his model itself is quite unsatisfactory from the economic point of view since it lacks individual utility functions and thereby disregards the aspect of the individual choice of space and location within the city 2 as a result he failed to analyze the effect of spatial segregation within the city on the long run nature of the residential composition of the city in this paper i develop a long run dynamic model of an open city which accommodates two groups of households for example blacks and whites rich and poor young and old with their utility functions depending on a consumption good and residential space i also assume two kinds of neighborhood externalities the first is called negative intergroup externalities that is the utility level of a typical household in one group is adversely affected by an increase in the number of households in the other group living in the city the second is called positive intragroup externalities that is the utility level of a typical household in one group is positively affected by an increase in the size of its own group in in the city first i define a mixed city equilibrium as a long run equilibrium which allows the two groups to coexist in the city in the long run and then introduce a dynamic adjustment process of household movement into and out of the city it is proved that the mixed city equilibrium is always unstable in the presence of negative intergroup externalities and or positive intragroup externalities if residential land is perfectly homogeneous and there is no differential transport cost incurred within the city it turns out however that in the case of a monocentric city with positive transport cost the mixed city equilibrium may be stable or unstable depending on the degree of neighborhood externalities because of the stabilizing effect of spatial segregation between the two groups within the city

regional versus multilateral trade liberalization environmental taxation and welfare the paper considers trade between identical countries with imperfectly competitive markets and compares the impacts of regional and multilateral tariff reduction on strategic environmental taxation and welfare while both forms of trade liberalization increase production and consumption in tariff reducing countries regionalism also reduces production in a non participating country and may decrease its consumption consequently regionalism and multilateralism change pollution tax and welfare in the tariff reducing countries in similar ways when pollution is local but in dissimilar ways for global pollution when pollution is global regionalism is likely to be preferred to multilateralism for the establishment of free trade among countries liberalisation du commerce regional versus celle du commerce multilateral fiscalite environnementale et bien etre ce memoire considere le commerce entre des pays identiques avec des marches de concurrence imparfaite et compare les impacts d une reduction regionale et multilaterale de tarifs sur la fiscalite environnementale strategique et le bien etre meme si les deux formes de liberalisation accroissent la production et la consommation dans les pays qui reduisent les tarifs le regionalisme reduit aussi la production dans un pays non participant et peut reduire sa consommation consequemment regionalisme et multilateralisme changent la taxe sur la pollution et le bien etre dans les pays qui reduisent leur tarif d une maniere similaire quand la pollution est locale mais de maniere dissimilaire quand la pollution est globale quand la pollution est globale le regionalisme est susceptible d etre prefere au multilateralisme pour l etablissement du libre commerce entre pays

tribe or nation nation building and public goods in kenya versus tanzania this article examines how government policies affect ethnic relations by comparing outcomes across two nearby districts one in kenya and one in tanzania using colonial era boundary placement as a natural experiment despite similar geography and historical legacies governments in kenya and tanzania have followed radically different language education and local institutional policies with tanzania consistently pursuing more serious nation building the evidence suggests that nation building has allowed diverse communities in rural tanzania to achieve considerably better local public goods outcomes than diverse communities in kenya to illustrate while kenyan communities at mean levels of diversity have 25 percent less local school funding than homogeneous communities on average the comparable figure in the tanzanian district is near zero the kenya tanzania comparison provides empirical evidence that serious reforms can ameliorate social divisions and suggests that nation building should take a place on policy agendas especially in africa

excess input expenditure estimated by means of an input distance function the case of public railways the input distance function is used to estimate excess input expenditure with reference to four european public railways this technique exploits the properties of the input distance function and allows excess input cost to be estimated over a minimum level rather than excess input usage this simplifies the computation of the cost of allocative inefficiency making the estimations easier and more reliable the results for the four railway systems reveal a substantial and statistically significant input expenditure in excess over the minimum level when evaluated over the whole sample period 1971 87 however differences between the four systems reduce over time all of the public railway systems show a clear tendency towards the reduction of inefficiency independent of dimension

analysing wage differentials when workers maximize the return to human capital investment abstractthe analysis of the determinants of differences in wages across workers has traditionally relied on the estimation of average earnings functions in this article we propose a new theoretical model where it is the workers who decide the amount they wish to invest in human capital taking into account the costs of acquiring those skills for the purpose of maximizing earnings in this model both human capital and marginal productivity are likely to be influenced by the individual s unobserved characteristics such as ability or motivation potentially giving rise to endogeneity problems in this context the empirical implementation of our theoretical model allows us under certain assumptions to obtain consistent estimates even under the assumption of endogeneity we present an empirical application to the education sector using data from the spanish structure of earnings survey 2010 our results show that females and workers in the private education sector face more difficulties in achieving t

the existence and uniqueness of optimal pollution policy in the presence of victim defense measures abstract it is to be expected that rational people defend themselves against pollution externalities at the very least through spatial separation from the source but even in the simplest models defensive behaviour generates nonconvexities multiple optima and inconclusive policy guidance this raises serious questions for the theory of environmental policy which have been largely ignored this paper derives a sufficient condition for a uniquely optimal emissions level in the presence of defensive activity the condition has an intuitive and in principal empirically testable interpretation two strategies for implementation are discussed an iterative tax rule and a non iterative demand revealing mechanism

direct regulation of a mobile polluting firm abstract we compare noncooperative regional environmental policy to cooperative national policy for direct regulation of a mobile firm the national government can always reach its first best with commitment but not with time consistent policy with commitment regional policy results in a game of chicken with too little output or in not in my backyard without commitment regional policy may improve upon national policy this happens when regional policy discourages the investment whereas the welfare reducing investment does take place with national policy

is bioenergy trade good for the environment we analyze the impacts of bioenergy trade on greenhouse gas emissions using a two good three factor model bioenergy is an agricultural good used as a substitute for fossil fuels in industry governments tax domestic pollution without international coordination we assume that northern countries have higher labor productivity than southern ones and that agriculture is less pollution intensive than industry after taxation we show that whereas southern countries impose a lower tax rate than northern ones they do not necessary have a competitive advantage in industry and that compared to autarky trade liberalization either increases or decreases worldwide emissions depending on regional comparative advantages

states and power in africa by jeffrey i herbst a review essay herbst argues that africa is plagued by state failure to provide certain public goods in society such as law and order defense contract enforcement and infrastructure herbst has provided a bold historically informed theoretical analysis essential reading for economists interested in comparative institutions and development

climate and international trade policies when emissions affect production possibilities abstract in this paper we develop a model of international trade and climate change in which emission discharges arising from production have a feedback effect on national production sectors by impacting upon effective factor endowments with this context the objectives are first to provide a general characterization of pareto efficient climate and trade policies and second to examine the possibility starting from non pareto efficient equilibria for pareto improving environmental policies we provide conditions under which several particular reforms of carbon taxes are welfare improving

trade spatial separation and the environment we develop a simple two sector dynamic model to show how pollution can provide a motive for trade by spatially separating incompatible industries we assume that the production of smokestack manufactures generates pollution which lowers the prod uctivity of an environmentally sensitive sector farming two identical unregulated countries will gain from trade if the share of world income spent on smokestack goods is high in contrast when the share of world income spent on the dirty good is low trade can usher in a negatively reinforcing process of environmental degradation and real income loss for the exporter of smokestack goods 1999 elsevier science b v all rights reserved

slacks determinants in brazilian railways a distance friction minimization approach with fixed factors this study investigates the drivers for output increasing input saving potentials in the brazilian railway industry which has undergone significant transformations since its privatization in the mid 1990s the main research objective is to determine whether or not different types of cargoes and geographic regions serviced present a significant impact on railway slacks by applying a distance friction minimization dfm approach with fixed factors based on a balanced panel model secondary data from the period 2004 to 2012 were collected and analysed results support anecdotal evidence regarding a heterogeneous impact of types of cargo and geographic location on input reducing and output increasing potentials besides network length and average speed policy implications for railway authorities are also addressed by focusing on the specifics of each railway operator

the relative efficiency of public and private firms in a regulated environment the case of u s electric utilities abstract the relative efficiency of privately owned and publicly owned electric utilities is investigated using theoretical and econometric models that allow for the effects of both ownership type and regulation the estimation results indicate that the two types of firms are equally cost inefficient in the united states the average effect of inefficiency is to increase the cost of production by 2 4 percent holding output constant inefficiency increases the average quantities demanded of capital and labor and decreases the average quantity demanded of fuel

development at the border policies and national integration in cote d ivoire and its neighbors regression discontinuity designs applied to a set of household surveys from the 1980 90s allow to examine whether cote d ivoire s aggregate wealth was translated at the borders of neighboring countries at the border of ghana and at the end of the 1980s large discontinuities are detected for consumption child stunting and access to electricity and safe water border discontinuities in consumption can be explained by differences in cash crop policies cocoa and coffee when these policies converged in the 1990s the only differences that persisted were those in rural facilities in the north cash crop cotton income again made a difference for consumption and nutrition the case of mali on the one hand large differences in welfare can hold at the borders dividing african countries despite their assumed porosity on the other hand border discontinuities seem to reflect the impact of reversible public policies rather than intangible institutional traits

transboundary pollution and the gains from trade we analyse the effects of transboundary pollution on trade patterns and welfare in a general equilibrium trade model production in a dirty industry generates pollution that negatively effects productivity both at home and abroad in a clean industry trade may lead to the spatial separation of production but the existence of transboundary pollution can offset the benefits from specialization we present a general model in which the effects of a country s pollution is country specific we analyse particular cases that correspond to an acid rain problem and a problem in which one country has a cleaner technology than the other we also present some results for small open economies to examine the effects of transboundary pollution in the absence of terms of trade effects

commodity price shocks and child outcomes the 1990 cocoa crisis in cote d ivoire abstract we look at the drastic cut of the administered cocoa producer price in 1990 cote d ivoire and study to which extent cocoa producers children suffered from this severe aggregate shock in terms of school enrollment labor height stature and morbidity using precrisis 1985 88 and postcrisis 1993 data we propose a difference in difference strategy to identify the causal effect of the cocoa shock on child outcomes whereby we compare children of cocoa producing households and children of other farmers living in the same district or the same village this causal effect is shown to be rather strong for the four child outcomes we examine hence human capital investments are definitely procyclical in this context we also provide evidence of gender bias against young girls with respect to education and health care we finally argue that the difference in difference variations can be interpreted as private income effects likely to derive from tight liquidity constraints

the allocative efficiency measure by means of a distance function the case of spanish public railways abstract this paper is an empirical application of the distance function to study the allocative efficiency of a regulated railway spanish firm renfe where the cost minimising hypothesis may be questioned besides and in contrast with other studies we include the possibility of the presence of persistent allocative inefficiency to achieve these aims we have estimated a system of equations for the inputs distance function and cost shares using annual data over the period 1955 95 using this procedure we have checked the presence of persistent allocative inefficiency in particular a systematic overutilisation of labour and underutilisation of capital moreover we have found some empirical evidence that since 1984 management contracts have improved the input allocation in spanish railways

pre recession efficiencies and input allocation decisions of agricultural and critically insolvent banks abstractthe late 2000s economic recession is considered the longest economic downturn since the 1930s great depression declining real estate values ignited an increase in loan defaults and mortgage foreclosures that led to a surge of bank failures at a rate not experienced by the u s banking industry since the 1980s a total of 509 bank failures were recorded by the fdic from january 2007 december 2014 with nearly 60 of these failures occurring in 2009 and 2010 in contrast there were only 24 bank failures in the u s during the 7 year period prior to 2007 this study analyzed certain components of operating decisions made by banks that either survived or became critically insolvent during the late 2000s financial crisis using an input distance stochastic frontier function to estimate the technical efficiency te and allocative efficiency ae between agricultural banks and non agricultural banks this efficiency analysis was applied to a 7 year pre recession period and is designed to final out any