contract enforcement and trade liberalization in mexico s footwear industry abstract the wave of formal legal system reforms sweeping developing countries provides only a partial solution to the problem of enforcing agreements between firms informal institutions govern the majority of interfirm transactions economic reform also necessitates changes in these institutions this paper examines the evolution of contract enforcement in the mexican footwear industry as trade barriers were removed in the closed economy geographic agglomeration of manufacturing allowed the manufacturers trade associations to maintain information about the behavior of retailers and gave retailers strong incentives to maintain reputations by providing an alternative source for procurement trade liberalization weakened the power of manufacturers

sustainability policy and environmental policy a theoretical representative agent economy with a depletable resource stock polluting emissions and productive capital is used to contrast environmental policy which internalises externalised environmental values with sustainability policy which achieves some form of intergenerational equity the obvious environmental policy comprises an emissions tax and a resource stock subsidy each equal to the respective external cost or benefit sustainability policy comprises an incentive affecting the choice between consumption and investment and can be a consumption tax capital subsidy or investment subsidy or a combination thereof environmental policy can reduce the strength of the sustainability policy needed more specialised results are derived in a small open economy with no environmental effects on utility

sustainability and externalities is the internalization of externalities a sufficient condition for sustainability in an important contribution in ecological economics van de bergh 2010 correctly concludes that sustainability does not imply zero externalities however he continues with the delphic statement delphic statements were uttered by the renowned oracle of ancient greece at delphi they were phrased in such a way as to be self fulfilling because alternative interpretations covered every possibility without externalities the problem of sustainability vanishes if this statement refers to an impossible economic process that produces no externalities then he is right however it might be interpreted as stating that whenever environmental policy internalizes environmental externalities then sustainability will be ensured in this note i assert that in the real world where externalities prevail their internalization or neutralization in the traditional way cannot lead to sustainability only if internalization takes a very specific form that results in the inviolable preservation of environmental rights of future generations in pure biological terms can sustainability be ensured after revised the original commentary i resubmit it the issues raised by the editor have been carefully considered

occupational self selection a human capital approach to sex differences in occupational structure a rich and diverse literature exists concerning the distribution of labor incomes one approach namely that of human capital concentrates on lifetime accumulation paths of earnings capacity units human capital individual variations in human capital imply differences in earnings power thereby yielding strong implications concerning earnings distribution within a population despite its explanatory power the human capital model has been widely criticized one criticism centers on its inability to obtain inferences concerning occupational distribution the purpose of this paper is to alleviate at least some such criticism by applying the hedonic price approach so as to embed occupational choice into the human capital framework the significance is that neoclassical economic theory can be used to obtain implications concerning the determinants of occupational structure excerpt

the environment and emerging development issues development economics for the most part has failed to recognize renewable environmental resources as economic goods yet the lives of the poor in developing countries are intimately tied to the fate of their local common property resources soil fuel wood water and so on ignoring the loss of common property renewable resources via degradation centralization or privatization in calculations of net national product can mask the destruction of resources available to a country s poor behind the false appearance of a growing national economy this paper describes the difference between the problem of managing local common property resources in developing countries and the problem of protecting the global commons such as the atmosphere and oceans it outlines the calculations that would include the local commons in the national income accounting of capital assets and argues that the interests of those most dependent on the increasingly scarce local commons will be best served by placing control in their hands while the central government provides infrastructure and educational support to control the pollution of the global commons on the other hand the paper sketches a plan in which most countries would have a high incentive to participate a global allocation of limited tradable permits to discharge defined pollutants

the structure of the female male wage differential is it who you are what you do or where you work the efficacy of policies to narrow the malelfemale wage differential depends partly on the size of the portion s of the gap targeted previous research finds no between sex wage gap within occupations within employer job cell this is the first study to disentangle segregation by occupation from that based on employer or on job cell in five industries controlling for other forms of segregation occupational segregation produces a gap of 11 percent manufacturing to 26 percent services the wage gaps from establishment and job cell segregation are about 6 percent each since comparable worth acts on the occupation and job cell components it has a potentially large impact

the concept of natural capital the natural environment is now commonly viewed as a form of capital asset or natural capital also included are ecosystems that provide important goods and services to the economy managing natural capital has consequences for sustainable development however there are contrasting weak versus strong sustainability views which in turn have implications for green accounting natural resource based sovereign wealth funds have emerged as key financial instruments for compensating resource depreciation with greater economy wide investments recent scientific evidence recommends demarcating safe operating spaces to limit exploitation of critical global biophysical subsystems or processes these challenges suggest that the concept of natural capital is pivotal to sound policy

the role of market forces in assuring contractual performance the conditions under which transactors can use the market repeat purchase mechanism of contract enforcement are examined increased price is shown to be a means of assuring contractual performance a necessary and sufficient condition for performance is the existence of price sufficiently above salvageable production costs so that the nonperforming firm loses a discounted steam of rents on future sales which is greater than the wealth increase from nonperformance this will generally imply a market price greater than the perfectly competitive price and rationalize investments in firm specific assets advertising investments thereby become a positive indicator of likely performance

interfirm relationships and informal credit in vietnam trading relations in vietnam s emerging private sector are shaped by two market frictions the difficulty of locating trading partners and the absence of legal enforcement of contracts examining relational contracting we find that a firm trusts its customer enough to offer credit when the customer finds it hard to locate an alternative supplier a longer duration of trading relationship is associated with larger credit as is prior information gathering customers identified through business networks receive more credit these network effects are enduring suggesting that networks are used to sanction defaulting customers

inequality aversion resource depletion and sustainability abstract a welfare function which incorporates aversion to inequality across generations is applied to the cake eating problem and it is shown that sustainability with positive welfare will be ensured provided that inequality aversion is sufficiently strong

gender difference in promotions new evidence from the internal labor market in china gender differences in the labor market have attracted significant attention from economists who focus on gender differences not only in wages but also in promotions however the research on gende

sustainability in natural resource management abstract sustainability is the objective that many disciplines indicate as being essential to the resolution of environmental degradation although there is no agreement about what this term exactly means this study defines environmental problems as externalities most of these occurring between different generations we analyze the reasons why traditional solutions for externalities do not work in the intergenerational context our conclusions are on the one hand that traditional methods for evaluating the costs and benefits affecting different generations should be improved secondly an intergenerational redistribution of natural resource property rights is essential to guarantee equality of opportunities for all generations and therefore to ensure sustainability adequate redistribution of property rights will depend on the type of resource as well as on other factors such as the rate of return on its exploitation and the current generations propensity to consume in all cases however sustainability is sufficiently guaranteed by conceding property rights as a whole to the future

the central role of noise in evaluating interventions that use test scores to rank schools many programs reward or penalize schools based on students average performance mean reversion is a potentially serious hindrance to the evaluation of such interventions chile s 900 schools program p 900 allocated resources based on cutoffs in schools mean test scores this paper shows that transitory noise in average scores and mean reversion lead conventional estimation approaches to overstate the impacts of such programs it further shows how a regressiondiscontinuity design can be used to control for reversion biases it concludes that p 900 had significant effects on test score gains albeit much smaller than is widely believed

the transition to modern agriculture contract farming in developing economies recent years have seen considerable interest in the impact of contract farming on farmers in developing countries motivated out of belief that contract farming spurs transition to modern agriculture in this article we provide a thorough review of the empirical literature on contract farming in bo

anomalies in intertemporal choice evidence and an interpretation research on decision making under uncertainly has been strongly influenced by the documentation of numerous expected utility eu anomalies behaviors that violate the expected utility axioms the relative lack of progress on the closely related topic of intertemporal choice is partly due to the absence of an analogous set of discounted utility du anomalies we enumerate a set of du anomalies analogous to the eu anomalies and propose a model that accounts for the anomalies as well as other intertemporal choice phenomena incompatible with du we discuss implications for savings behavior estimation of discount rates and choice framing effects

how private contract enforcement mechanisms can succeed where public institutions fail the case of juhocukor a s the enforcement of contracts is necessary for efficient exchange and investment in economic activities contracts can be enforced through a variety of mechanisms both public and private however in many developing and transitional countries these public institutions are either absent or ineffective in ensuring contract enforcement under such conditions private enforcement mechanisms may provide a suitable replacement for public enforcement institutions this may be done externally through a third party or internally through self enforcing agreements this paper analyzes the use of self enforcing arrangements or internal private enforcement mechanisms using a case study of an agri business in a transition economy juhocukor a s a slovakian sugar processor we show that the use of internal private contract enforcement mechanisms can have a significant positive effect on output and efficiency for both partners to the exchange transaction in an environment characterized by the absence or ineffectiveness of public enforcement institutions 2000 elsevier science b v all rights reserved

dimensions of sustainability geographical temporal institutional and psychological well being depends on produced goods natural amenities and preferences each can be influenced through policies and education production of goods exhibits a hierarchical structure similar to ecosystems subsystems adapt while sustaining system productivity that is higher levels have greater resilience in agriculture the farm has little adaptability the region can shift production among locations and a nation can shift among regions forests exhibit an intertemporal geographical hierarchy in which harvests are replaced by growth elsewhere and later regrowth this structure is useful in responding to change and uncertainty preferences too can and must be informed through education

sustainability economics general versus specific and conceptual versus practical we clarify the definition and interpretation of sustainability economics baumgartner and quaas 2010 in response to recent comments by van den bergh 2010 bartelmus 2010 and others for that sake we distinguish between general and specific definitions of sustainability and sustainability economics as well as between conceptual and practical approaches

explaining occupational sex segregation and wages findings from a model with fixed effects does segregation arise because female occupations have financial advantages for women planning to spend some time as homemakers as human capital theorists claim do male occupations have more onerous working conditions that explain their higher earnings as the neoclassical notion of compensating differentials suggests or do female occupations have low wages that are depressed by the sort of discrimination at issue in comparable worth as sociologists have argued to answer these questions the authors use a model with fixed effects to predict the earnings of young men and women from a pooled cross section time series of the national longitudinal survey analyses are undertaken for both blacks and whites a fixed effects model is useful for answering these questions because it corrects for the selection bias that results from the tendency of persons who differ on stable characteristics that are unmeasured but affect earnings to select themselves into different occupations the authors find little evidence that female occupations provide either low penalties for intermittent employment at high starting wages the advantages human capital theorists have argued them to have rather there is evidence of pay discrimination against men and women in predominantly female occupations implications for economic and sociological theories of labor markets are discussed authors

prejudice and wages an empirical assessment of becker s the economics of discrimination we test the predictions from becker s 1957 seminal work on employer prejudice and find that relative black wages a vary negatively with the prejudice of the marginal white in a state b vary negatively with the prejudice in the lower tail of the prejudice distribution but are unaffected by the prejudice of the most prejudiced persons in a state and c vary negatively with the fraction of a state that is black our estimates suggest that one quarter of the racial wage gap is due to prejudice with nontrivial consequences for black lifetime earnings

an environmental economic measure of sustainable development abstract a central issue in the study of sustainable development is the interplay of growth and sacrifice in a dynamic economy this paper investigates the relationship among current consumption sacrifice and sustainability improvement in a general context and in two canonical stylized economies we argue that the maximin value of utility measures what is sustainable and provides the limit to growth maximin value is interpreted as a dynamic environmental economic carrying capacity and current utility as an environmental economic footprint the time derivative of maximin value is interpreted as net investment in sustainability improvement it is called durable savings to distinguish it from genuine savings usually computed with discounted utilitarian prices

one sided sustainability tests with amenities and changes in technology trade and population abstract if an economy with multiple consumption goods including environmental amenities uniquely maximises present value with constant discounting it is unsustainable at some time if either of two measures augmented net investment or the change in augmented green net national product are zero or negative then augmented denotes that time is treated as a productive stock which includes in each measure the value of future exogenous changes in technology or terms of trade adjustments are found to make each measure a test for individual sustainability when population grows exogenously the practical and philosophical rationale for testing sustainability in a present value maximising and therefore fully prescribed development path is discussed

new evidence on sex segregation and sex differences in wages from matched employee employer data we use new matched employer employee data to estimate the contributions of sex segregation and wage differences by sex within occupation industry establishment and occupation establishment cells to the overall sex gap in wages in contrast to earlier data used to study this question our data cover all industries and occupations across all regions of the united states we find that segregation of women into lower paying occupations industries establishments and occupations within establishments accounts for a sizable fraction of the sex gap in wages nonetheless approximately one half of the sex gap in wages remains attributable to the individual s sex

wages seniority and the demand for rising consumption profiles abstract in many occupations wages rise faster than productivity over the life cycle other authors have suggested a variety of explanations for this pattern we argue that these explanations fail for at least two occupations commercial airline pilots and intercity bus drivers we then explore an alternative explanation based on the assumption that satisfaction depends on not only the level of consumption but also its rate of change we argue that upward sloping wage profiles are an expedient substitute for personal savings as a means for achieving upward sloping consumpion profiles

gender segregation in occupations the role of tipping and social interactions this paper documents that the dynamics of occupational segregation are highly nonlinear and exhibit tipping patterns occupations experience discontinuous declines in net male employment growth at tipping points ranging from 25 to 45 from 13 to 30 female in white collar blue collar occupations from 1940 to 1990 these patterns appear consistent with a schelling 1971 social interaction model where tipping results from male preferences toward the fraction female in their occupation supporting the model s predictions evidence from the general social survey indicates that tipping points are lower in regions where males hold more sexist attitudes toward the appropriate role of women

tipping and the dynamics of segregation schelling dynamic models of segregation journal of mathematical sociology 1 1971 143 186 showed that extreme segregation can arise from social interactions in white preferences once the minority share in a neighborhood exceeds a tipping point all the whites leave we use regression discontinuity methods and census tract data from 1970 through 2000 to test for discontinuities in the dynamics of neighborhood racial composition we find strong evidence that white population flows exhibit tipping like behavior in most cities with a distribution of tipping points ranging from 5 to 20 minority share tipping is prevalent both in the suburbs and near existing minority enclaves in contrast to white population flows there is little evidence of nonlinearities in rents or housing prices around the tipping point tipping points are higher in cities where whites have more tolerant racial attitudes

genuine savings and sustainability genuine savings gs has emerged as the leading economic indicator of sustainable economic development at the country level it derives from the literatures on weak sustainability wealth accounting and national income accounting we discuss the theoretical underpinnings of gs focusing on the relationship between changes in a nation s extended capital stock and the future path of consumption the indicator has entered widespread use propelled by the world bank s publications despite its varying performance as a predictor for future consumption notwithstanding the extensive body of literature reviewed promising future research avenues are identified

net national product as an indicator of sustainability net national product nnp can potentially serve several objectives among others to measure value added and to be an indicator of welfare in the aftermath of the world commission on environment and development however it also seems important to investigate whether the concept of nnp can serve as an indicator of sustainability my point of departure following hicks 1946 ch 14 is therefore to require that nnp should measure what can be consumed in the present period without reducing future consumption possibilities and in line with this to argue that the nnp should equal the maximum per capita consumption level that can be sustained if sufficiently many facilitating assumptions are made then a concept of nnp that serves as an exact indicator of sustainability can easily be constructed for instance for a closed economy with a constant population a stationary technology and with only one capital good it follows that the present does not reduce future consumption possibilities if and only if it does not decrease the stock of the single capital good hence under the assumption that the one capital good k is identical to the one consumption good x nnp defined as y x k measures the maximal sustainable consumption at time t because then x y is equivalent to k the purpose of this note is to establish that with multiple capital goods it is not in general possible to construct an exact indicator of sustainability on the

accounting for india s forest wealth in this paper we account for forest wealth in india changes in the timber and carbon wealth embodied in these forests are related to important green national accounting aggregates such as genuine saving and the change in wealth per capita important accounting issues include the timing of carbon releases that occur when forests are disturbed as well as the valuation of these releases our empirical findings suggest that while india s forest wealth is substantial net changes in this wealth are arguably not so large at least in relation to gnp however when viewed in the context of the wealth diluting effects of population growth this implies a far larger additional savings effort is required to cover the net loss in forest values than otherwise appears to be the case finally we examine ways in which the accounting approach that we adopt can be reconciled with approaches which stress conserving forest wealth

feasibility and optimality of sustainable growth under materials balance abstract pollution from consumption and production is an inevitable part of economic processes we employ a materials balance approach and develop an endogenous growth theory with recycling activity to examine the evolution of the economic and environment systems this paper provides feasibility and optimality conditions for sustainable economic growth with rising environmental quality the fundamental condition of feasibility is that the flow of natural resources which eventually returns to the environment as waste and pollution has a negative growth rate in the long run

discrete choice with social interactions this paper provides an analysis of aggregate behavioural outcomes when individual utility exhibits social interaction effects we study generalized logistic models of individual choice which incorporate terms reflecting the desire of individuals to conform to the behaviour of others in an environment of noncooperative decisionmaking laws of large numbers are generated in such environments multiplicity of equilibria in these models which are equivalent to the existence of multiple self consistent means for average choice behaviour will exist when the social interactions exceed a particular threshold local stability of these multiple equilibria is also studied the properties of the noncooperative economy are contrasted with the properties of an economy in which a social planner determines the set of individual choices finally a likelihood function based on the theoretical model is given and conditions for the econometric identifiability of the model are established

the welfare economic theory of green national accounts this paper takes a critical look at the literature on green national accounts the problem studied is to find a linear index of economic variables that responds to perturbations in the same direction as social well being the thesis of a large literature that net national product which is a flow is that index in closed economies is shown in some interpretations to be simply false and in others to suffer from deep estimation problems it is argued that capital depreciation using shadow prices should certainly be included in national accounts but that the right welfare index is a comprehensive measure of wealth defined as the shadow value of an economy s stock of all capital assets it is shown that comprehensive wealth is usable as a criterion for policy evaluation as well as for determining sustainable economic development

towards an ecological economics of sustainability abstract persistent disagreement both as to the interpretation to be given to sustainability and as to the relation between ecological and economic sustainability has hindered the development of an ecological economics of sustainable resource use this paper identifies the main concepts of sustainability deriving from the two disciplines in order to explore the difference implied by an ecological approach to the problem it is argued that present economic and ecological approaches are largely disjoint and that they address basically different phenomena by combining the efficiency requirements of what is usually thought of as economic sustainability with the stability requirements of an ecological approach it is shown that an intertemporally efficient allocation of resources that satisfies the conditions for constant levels of consumption is not necessary to assure ecological sustainability ecological sustainability requires that the allocation of economic resources should not result in the instability of the economy environment system as a whole

evolution of time preference by natural selection this paper entertains the hypothesis that human time preferences are in evolutionary equilibrium i e that no mutation changing time preferences could be favored by natural selection this hypothesis implies that the marginal rate of substitution mrs holding darwinian fitness constant must equal the mrs holding utility constant furthermore in a market economy the latter must equal the mrs in exchange exploiting these principles the author finds that the long term real interest rate should equal ln 2 per generation about 2 percent per year and that young adults should discount the future more rapidly than their elders copyright 1994 by american economic association

efficiency of conservationist measures an optimist viewpoint abstract we consider an economy with a consumer good capital a natural resource that provides amenity values and heterogeneous overlapping generations we compare a benchmark grandfathering policy that ensures efficiency through privatization with a policy of enforced resource conservation it is shown that i conservationist measures do not cause any pareto inefficiency irrespective of whether they pass a cost benefit test moreover it is shown that ii there exist pareto optimal allocations that can only be reached through resource conservation and not through competitive markets irrespective of compensating income transfers finally iii equivalence is demonstrated between strict resource conservation and non dictatorship of the present generations over future generations as formalized in chichilnisky s sustainable welfare function the results are shown to hold in both a first best and a second best setting

constant savings rates and quasi arithmetic population growth under exhaustible resource constraints in the dasgupta heal solow stiglitz dhss model of capital accumulation and resource depletion we show the following equivalence if an efficient path has constant gross and net of population growth savings rates then population growth must be quasi arithmetic and the path is a maximin or a classical utilitarian optimum conversely if a path is optimal according to maximin or classical utilitarianism with constant elasticity of marginal utility under quasi arithmetic population growth then the gross and net of population growth savings rates converge asymptotically to constants

why hold ups occur the self enforcing range of contractual relationships one of my most enjoyable intellectual experiences was working with armen alchian on the klein crawford and alchian 1978 hold up paper in this paper i extend the basic framework presented in that paper pointing out what i now consider to be its shortcomings and providing insights into the nature of hold ups and the form of contracts chosen by transactors to avoid hold ups the major analytical extension entails combining hold up analysis with my work on private enforcement because private enforcement capital is limited and written contract terms are necessarily imperfect transactors must optimally combine court enforced written terms together with privately enforced unwritten terms to define what i call the self enforcing range of their contractual relationship hold ups occur when unanticipated events place the contractual relationship outside the self enforcing range this probabilistic framework where transactors enter contractual relationships knowing that a hold up may take place but believing that the expected gains from trade outweigh the expected rent dissipating costs associated with the hold up risk is shown to have important implications for understanding the structure of contracts adopted by transactors in the marketplace i why do hold ups occur i begin with a simple example that illustrates the basic economic forces involved in a hold up assume that a builder constructs a house on a piece of land the builder does not own but rather only leases short term after the initial land lease expires the landowner could hold up the builder by raising the land rent to reflect the costs of moving the house to another lot this example illustrates all the hold up factors emphasized in klein crawford and alchian a the builder has made an investment that is highly specific to a particular piece of land and b the landowner has taken advantage of the incompleteness of the contract that governs the relationship in particular the fact that the lease does not cover future years to c expropriate the quasi rents on the builder s specific investment the obvious question is why anything like this would ever occur that is why would someone be so naive as to build a house on land for which they had only a short term lease our primary goal in klein crawford and alchian was not to explain the existence of hold ups but rather the institutions adopted by transactors to avoid hold ups for example we would expect that builders anticipating a potential hold up problem would decide to purchase the land or at least to sign a long term ground lease before starting construction however we do present some examples in the paper of hold ups that actually occurred the implicit reason we give for the occurrence of these hold ups is transactor ignorance apparently transactors are not always smart enough to choose the contractual arrangement that would eliminate the hold up problem oliver williamson provides a similar but much more explicit answer to the question of why hold ups occur when defining opportunism he states by opportunism i mean self interest seeking with guile this includes but is scarcely limited to more blatant forms such as lying stealing and cheating opportunism more often involves subtle forms of deceit more generally opportunism refers to the incomplete or distorted disclosure of information especially to calculated efforts to mislead distort obfuscate or otherwise confuse 1 for example the hold up may have occurred in our illustrative house construction example because the landowner deceived the builder with a low up front land rental price and vague promises about the future relying on the ability of one transactor to take advantage of the naivete or ignorance of another transactor is a highly unsatisfactory way to explain the incidence of hold ups simple examples of deception such as a builder constructing a house on land that is only rented short term rarely if ever occur

towards a more inclusive and precautionary indicator of global sustainability abstract we construct a hybrid economic indicator of the sustainability of global well being which is more inclusive than existing indicators and incorporates an environmentally pessimistic physical constraint on global warming our methodology extends the world bank s adjusted net saving ans indicator to include the cost of population growth the benefit of technical progress and a much higher precautionary cost of current co 2 emissions future warming damage is so highly unknowable that valuing emissions directly is rather arbitrary so we use a novel inductive approach we modify damage and climate parameters in the deterministic dice climate economy model so it becomes economically optimal to control emissions in a way likely to limit warming to an agreed target here 2 c if future emissions are optimally controlled our ans then suggests that current global well being is sustainable but if emissions remain uncontrolled our base case ans is negative now and our corresponding modified dice model has an unsustained development path with well being peaking in 2065 current ans on an uncontrolled path may thus be a useful heuristic indicator of future unsustainability our inductive method might allow ans to include other very hard to value environmental threats to global sustainability like biodiversity loss and nitrogen pollution

when individual preferences defy sustainability can merit good arguments close the gap in this paper we discuss how merit good arguments may contribute to discussions about sustainability to this end we clarify how merit good arguments deviate from individual preferences and relate the justification for deviations from individual preferences to two conceptions of well being an informed preference satisfaction and a perfectionist conception building on this framework we analyze how merit good arguments can be helpful for discussing sustainability as justice what challenges merit good arguments pose to future generations and whether they can serve as a normative justification for green nudges the analysis yields two main insights first a reflection on the concept of merit goods is helpful in sorting out the different justifications that sustainability interventions may rely on in particular it allows separating the challenges of redistribution internalization of externalities and increasing individual consumption of particular merit goods such as health care or education more clearly second the precise notion of merit goods by itself however only offers a limited contribution and does not represent a blank check to justify deviations from individual preferences

competitive equilibria and sustainable growth in a life cycle model with natural resources the purpose of this note is to consider interactions between capital accumulation and natural resource exploitation in diamond s 1965 overlapping generations olg model the presumption in the literature on economic growth under resource constraints e g solow 1974 or stiglitz 1974 is that constant standards of living are possible in the presence of nonreproducible natural resources even in the absence of technical progress provided only that capital and resources are good substitutes in production and society makes sufficient investments in reproducible capital to offset the optimally declining stock of natural resources this literature ignores generation overlap and treats society in each period as a single generation which cares about and also discounts the welfare of its immediate descendants and which has complete control over the rate of resource use and the saving rate whether a sequence of selfish finite lived and interdependent generations interacting via competitive markets will implement these paths is an open question this note introduces a stationary population log linear version of diamond s model in which natural resources are selfreproducible and essential in production and capital depreciates completely after one period in this environment it is technically feasible to achieve growth paths in which the input and the stock of natural resources are constant and in which capital accumulation leads to growth in living standards these paths of resource use can be interpreted as emanating from the normative concept of sustainable development now advocated

intertemporal preferences and intergenerational equity considerations in optimal resource harvesting abstract optimal resource harvesting decisions are reexamined in light of a distinction between personal discount rates reflecting individuals rate of time preference and generational discount rates reflecting considerations of equity for future generations the discount rates have partially counteracting effects upon the optimal harvesting decisions and upon the optimal distribution of benefits in any one period for instance it is the generational discount rate that determines the potential for economically optimal extinction of a renewable resource by distinguishing the two discount rates it is possible to give each generation equal consideration while still allowing for individual impatience

comparing augmented sustainability measures for scotland is there a mismatch we estimate and compare two empirical measures of the weak sustainability of an economy for the first time the change in augmented green net national product gnnp and the interest on augmented genuine savings gs yearly calculations are given for each measure for scotland during 1992 1999 augmentation means including using projections to 2020 changed production possibilities enabled by exogenous technical progress or changing oil prices the change in augmented gnnp and the interest on augmented gs are both always positive showing no sustainability problem for scotland then according to the assumptions underlying our weak sustainability calculations however the former greatly exceeds the latter even when macroeconomic fluctuations are taken into account this is a mismatch which poses an unresolved problem with the theory resolving it may require respecifying the utility functions used in mainstream growth theory

bootstrap inference in econometrics the astonishing increase in computer performance over the past two decades has made it possible for economists to base many statistical inferences on simulated or bootstrap distributions rather than on distributions obtained from asymptotic theory in this paper i review some of the basic ideas of bootstrap inference the paper discusses monte carlo tests several types of bootstrap test and bootstrap confidence intervals although bootstrapping often works well it does not do so in every case

contractual arrangements and enforcement in transition agriculture theory and evidence from china abstract this paper empirically investigates the relationship between contractual arrangements and their enforcement in chinese agriculture based on an analysis of a survey of 100 agribusiness firms engaged in contract farming in zhejiang province of china we find that private contract enforcement mechanisms play an important role in influencing smallholders decisions to breach or fulfill contracts contract arrangements such as floor pricing or requiring smallholders to make specific investments facilitate self enforcement and significantly improve the smallholder s contract fulfillment rate this is particularly important in chinese agriculture since the business environment is characterized by an absence of effective public enforcement institutions

a dynamic analysis of human welfare in a warming planet anthropogenic greenhouse gas ghg emissions have caused atmospheric concentrations with no precedents in the last half a million years inducing serious uncertainties about future climates and their effects on human welfare recent climate science supports the view that the climate stabilization will require very low ghg emissions in the future we ask is a path of low emissions compatible with sustainable levels of human welfare with steady growth in human quality of life addressing these questions requires both defining welfare criteria and empirically estimating the possible paths of the economy we specify and calibrate a dynamic model with four intertemporal links education physical capital knowledge and the environment in line with nordhaus 2008a and with the stern review 2007 we assume that ghg emissions allow increased production while a higher stock of atmospheric carbon decreases production our index of human welfare which we call quality of life quol emphasizes education knowledge and the environment affected by greenhouse gas emissions in addition to consumption and leisure thus we avoid a consumptionist fallacy that welfare depends only on commodity consumption and perhaps leisure we reject discounted utilitarianism as a normative criterion and consider two alternatives the first is an intergenerational maximin criterion which maximizes the quality of life of the first generation subject to maintaining at least that level for all successive generations the second is human development optimization that seeks the maximization of the quol of the first generation subject to achieving a given constant rate of growth in all subsequent generations hence our analysis focuses on a human notion of sustainability as opposed to the conventional green sustainability limited to keeping the quality of the environment constant because our dynamic optimization programs defy explicit analytical solutions our approach has been computational as a benchmark we consider a simple model with physical and human capital for which we prove a turnpike theorem we then devise a computational algorithm inspired by the turnpike property to construct feasible although not necessarily optimal paths in the more complex and realistic model our analysis indicates that with ghg emission paths entailing very low emissions in the future positive rates of growth in quol are possible while the first generation experiences a quol higher than the historical reference level we also observe a tradeoff between the quality of life of the first generation and the rate of growth in the quality of life yet generation 1 s sacrifice for the sake of a higher growth rate appears to be small the paths that we compute involve investments in knowledge at noticeably higher levels than in the past

sustained development of a society with a renewable resource abstract a maximin program is applied to a policy of sustaining a simple society whose population is dependent on a resource subject to logistic growth regular and non regular paths are characterized there are continua of both regular and non regular solutions the type depending on the initial conditions a non regular path involves an intermediate part in which the sustainment constraint is not effective all solutions are time consistent and pareto optimal because a problem may not be regular it is not valid to assume that sustainment implies constant utility

economics and identity this paper considers how identity a person s sense of self affects economic outcomes we incorporate the psychology and sociology of identity into an economic model of behavior in the utility function we propose identity is associated with different social categories and how people in these categories should behave we then construct a simple game theoretic model showing how identity can affect individual interactions the paper adapts these models to gender discrimination in the workplace the economics of poverty and social exclusion and the household division of labor in each case the inclusion of identity substantively changes conclusions of previous economic analysis

the rise fall and sustainability of capital resource economies in debates about green accounting it is sometimes argued that a positive value of aggregate investments indicates that an economy is developing sustainably asheim 1994 and pezzey 1994 have shown that this is wrong using a version of the well known dasgupta heal economy with one capital and one non renewable resource stock as a counterexample asheim s proof referred to the unproved assumptions that in such an economy a higher rate of time preference induces higher initial consumption and vice versa and that optimal consumption is initially rising and then falling here we show that these assumptions do hold true under certain circumstances thereby also proving some of dasgupta and heal s other conjectures about sustainability

sustainability with uncertain future preferences a feature of the sustainability problem is that the preferences of future generations are uncertain in this paper we put forward a fairness based definition of sustainability that takes this uncertainty into account we analyze the implications of this definition in the context of a model of project evaluation we show that our definition encompasses the concepts of non declining welfare and of weak and strong sustainability furthermore we show that preference uncertainty has a substantial influence on the implications of sustainability

sustainability under uncertainty a deontological approach a deontological or kantian approach to intergenerational fairness suggests that sustainability criteria should be imposed as prior constraints on the maximization of social preferences concerning the distribution of welfare between present and future generations in particular it is plausible to assert that each successive generation holds a duty to ensure that the expected welfare of its offspring is no less than its own perceived well being this moral rule implies a bias against actions that generate present benefits but impose the risk of irreversible future losses if the preservation of options would allow for improved decisions as new information became available

courts and contract enforcement in transition agriculture theory and evidence from poland abstract the paper investigates theoretically and empirically the role of courts for contract enforcement in transition agriculture in a survey of 306 polish farmers conducted in 1999 only 38 5 respondents reported to believe that they could use courts to enforce contracts with their most important customer furthermore those who believed the legal system could be used would accept significant financial losses before taking action we develop a theoretical model based on the costs and benefits of court enforcement which captures the boundary between contracts to be regarded as enforceable and not enforceable and simultaneously the threshold of taking legal action the empirical analysis strongly supports our model 1 the farmers responses can be explained by cost benefit calculations regarding the use of courts 2 the legal enforceability of contracts depends not only on the efficiency of the legal system but also on the attributes of the transaction the contracts and the relationship between buyer and seller and 3 the threshold of taking legal action is significantly influenced by indirect costs of court enforcement such as the disruption of a valuable business relationship and by the availability of alternative enforcement mechanisms

supply chain differentiation contract agriculture and farmers marketing preferences the case of sweet pepper in thailand there is an emerging body of literature analyzing how smallholder farmers in developing countries can be linked to modern supply chains however most of the available studies concentrate on farm and farmer characteristics failing to capture details of institutional arrangements between farmers and traders moreover farmers preferences have rarely been considered here we address these gaps by analyzing different market channels for sweet pepper in thailand using data from a survey and choice experiment with farmers we find that there is a general preference for marketing options that do not involve a contract additional provision of inputs and credit can increase the attractiveness of contracts yet the most important factor for farmers is to personally know the buyer they deal with which may be related to issues of trust some policy implications are discussed

trust law sustainability and responsible action abstract the problem of managing for sustainability is marked by the need to make decisions on behalf of others and by the uncertainties that attend such decisions however the economic literature on sustainability has paid scant attention to how decisions on behalf of others might differ from decisions on behalf of oneself and when risk has been modeled explicitly the expected utility hypothesis has generally been used a generation acts sustainably if the expected value of the next generation s utility is not less than the present s this paper investigates how we think about responsibly acting on another s behalf by looking to the united states law of trusts because in important respects the current generation views its responsibility to the future as a trust relationship trust law illuminates responsible decision making under both risk and uncertainty even under conditions of risk more conservative action than would be suggested by the expected utility hypothesis is warranted because it emphasizes preservation of trust principal and disavows profit maximization trust doctrine indicates that special caution should be exercised in conditions of uncertainty finally resource economic concepts of strong sustainability the precautionary principle and the safe minimum standard of conservation are interpreted according to trust principles

learning by doing and the costs of a backstop for energy transition and sustainability we assess the impact of being able to substitute an unlimited but costly energy substitute like wind solar for a non renewable resource like oil coal in a model of sustainable growth the prospects for sustainability on the optimal path depend crucially on the costs of this substitute furthermore the poorer a country measured in terms of capital stock at a given point in time the later it should switch to the renewable substitute and the more likely it will be unsustainable taking learning by doing in account we find that this leads to an earlier switching time but does not guarantee sustainability

nature or nurture learning and the geography of female labor force participation one of the most dramatic economic transformations of the past century has been the entry of women into the labor force while many theories explain why this change took place we investigate the process of transition itself we argue that local information transmission generates changes in participation that are geographically heterogeneous locally correlated and smooth in the aggregate just like those observed in our data in our model women learn about the efiects of maternal employment on children by observing nearby employed women when few women participate in the labor force data is scarce and participation rises slowly as information accumulates in some regions the efiects of maternal employment become less uncertain and more women in that region participate learning accelerates labor force participation rises faster and regional participation rates diverge eventually information difiuses throughout the economy beliefs converge to the truth participation attens out and regions become more similar again to investigate the empirical relevance of our theory we use a new county level data set to compare our calibrated model to the time series and geographic patterns of participation

maximin viability and sustainability the maximin criterion defines the highest utility level that can be sustained in an intergenerational equity perspective the viability approach makes it possible to characterize all the economic trajectories sustaining a given not necessarily maximal utility level in this paper we exhibit the strong links between maximin and viability we show that the value function of the maximin problem can be obtained in the viability framework and that the maximin path is a particular viable path this result allows us to extend the recommendations of the maximin approach beyond optimality to characterize the sustainability of economic trajectories which differ from the maximin path attention is especially paid to non negative net investment at maximin accounting prices which is shown to be necessary to maintain the productive capacity of the economy whether the development path is optimal or not our results provide a new theoretical ground to account for sustainability in imperfect economies based on maximin prices

adaptive policy framework through the lens of the viability theory a theoretical contribution to sustainability in the anthropocene era the earth is an evolutionary system that can be viewed as a social ecological system built around money sesm because of the coupling of the anthropocene era with globalization given the simultaneous environmental economic risks of total uncertainty and systemic aftermath several paradigmatic turns are required ecological economics is a cutting edge field that tackles this issue an integrative framework involving co evolutionary modelling offers methods for addressing the regulation issue that arises from the significant uncertainty driven by global economic and ecological risks we tackle the issue of adaptive policy for sesm regulation by answering the call for paradigmatic turns which leads us to support tychastic vs stochastic uncertainty in time adaptation vs optimal belated solutions viability vs stationary equilibrium and interdisciplinarity and participatory processes in modelling and policy action we describe step by step how to conceive sesm modelling through the lens of the mathematical viability theory mvt and we argue that this lens when adjusted for anticipatory and adaptive governance aag is relevant to examining sustainability for complex adaptive sesms from a local or global perspective

sustainability of an economy relying on two reproducible assets evaluating the sustainability of a society requires a system of shadow or accounting values derived from the sustainability objective as a first step toward the derivation of such shadow values for a maximin objective this paper studies an economy composed of two reproducible assets each producing one of two consumption goods the effect of the substitutability between goods in utility is studied by postulating in turn neoclassical diminishing marginal substitutability perfect substitutability and perfect complementarity the degree of substitutability has strong effects on the maximin solution affecting the regularity or non regularity of the program and on the accounting values this has important consequences for the computation of genuine savings and the sustainability prospects of future generations

school segregation and the identification of tipping behavior we develop a method to empirically implement the schelling model of segregation and use it to study racial segregation in los angeles schools from 1995 to 2012 our two step method combines the estimation of parents preferences for their children s peers with a counterfactual simulation analysis we find substantial heterogeneity in the existence and locations of tipping points and stable equilibria schools are observed on equilibrium trajectories but many remained out of equilibrium by 2012 we also introduce novel instrumental variables to identify preferences for endogenous peer groups that require no additional data and can be used in other educational settings

private enforcement capital and contract enforcement in transition economies the enforcement of contracts is necessary for efficient exchange and investment in economic activities there are many situations where public institutions are ineffective in enforcing contracts this is the case in economies in transition where public enforcement institutions themselves are being reformed under such conditions private mechanisms could enforce contracts external private enforcement is done by third parties e g strong arm private agents although such enforcement may be effective it may have unwanted externalities alternatively internal private enforcement can be done through the use of so called private enforcement capital i e private losses that result from breaching the contract these losses result directly from contract termination or non renewal and indirectly from reputational damage by designing contracts such that these private losses from contract breach outweigh potential benefits contracts can be made self enforcing in this article we first present a conceptual framework to interpret contracts and to analyze how the use of private enforcement capital can enforce contracts then we illustrate such internal private contract enforcement mechanisms with several case study examples of agri business contracting in transition countries where public enforcement fails

do workers prefer increasing wage profiles we present survey data challenging the assumption implicit in analyses of labor supply that all else being equal workers prefer declining over increasing wage profiles we test several explanations for our results including that a there is something special about wages e g their association with productivity as opposed to other types of payments that induces the preference for increasing wages b utility depends not only on absolute levels of consumption but also on changes in consumption over time and c respondents who prefer increasing wage profiles are irrational and would change their behavior if the rationale for preferring declining wages were explained

explaining women s success technological change and the skill content of women s work the closing of the gender wage gap is an ongoing phenomenon in industrialized countries however research has been limited in its ability to understand the causes of these changes due in part to an inability to directly compare the work of women to that of men in this study we use a new approach for analyzing changes in the gender pay gap that uses direct measures of job tasks and gives a comprehensive characterization of how work for men and women has changed in recent decades using data from west germany we find that women have witnessed relative increases in non routine analytic tasks and non routine interactive tasks which are associated with higher skill levels the most notable difference between the genders is however the pronounced relative decline in routine task inputs among women with little change for men these relative task changes explain a substantial fraction of the closing of the gender wage gap our evidence suggests that these task changes are driven at least in part by technological change we also show that these task changes are related to the recent polarization of employment between low and high skilled occupations that we observed in the 1990s

on sustainability and social welfare abstract this paper proposes to define sustainability in terms of leaving it possible for future generations to sustain certain defined targets it is shown that variants of genuine savings and the ecological footprint can then serve as indicators of sustainability the link between sustainability and intergenerational welfare is examined and it is shown how to incorporate indicators of sustainability into a social welfare measure including risk in the analysis

sustainability constraints versus optimality versus intertemporal concern and axioms versus data sustainable sustained or survivable development are defined here as distinct sustainability constraints on intertemporal distribution in a context which ignores uncertainty environmental and intratemporal concerns such constraints are neither self contradictory nor redundant for they can conflict with maximizing the present value of utility optimality nor inferior since the axioms underlying optimality are ethically arbitrary and refuted by empirical psychological data axiomatic arguments may clarify but cannot resolve debates about intertemporal concerns data suggest that sustainability constraints are not respected and that intertemporal welfare functions containing a preference for sustained improvement may better reflect what bodies politic mean by sustainability

the inclusive wealth index a critical appraisal abstract among recent high profile propositions to revise national accounts and to provide new indicators of sustainability and well being the inclusive wealth framework and the related inclusive wealth index iwi undoubtedly stand out as one of the most promising endeavours built up at the confluence of welfare development and sustainability economics the indicator has been designed to bring information about the wealth of nations and their sustainability in a comprehensive way the inclusive wealth framework is nevertheless fraught with limitations due to questionable theoretical assumptions gaps in data availability unrealistic assumptions about the future and inability to account for distributional issues we propose a non exhaustive critical appraisal of the index and its underlying framework we conclude that these limitations undermine its capacity to fulfil the requirements of a satisfactory sustainability indicator we argue that most problems lie in the substantial discrepancy between the inclusive ambition of the indicator and the scarce means to implement it whereas the interconnectedness of the various assets that constitute wealth as well as their complex evolution through time are acknowledged by the proponents of inclusive wealth the way the iwi is computed is rather a mere addition of layers of actuarial like monetary values for a not inclusive yet range of capital assets caution is thus warranted while using such an approach and shorter range alternatives to pursue similar goals are proposed

sector level decisions in a sustainability constrained economy despite two decades of debate there remains little consensus about what sustainability is and how it should be achieved economists primarily portray sustainability as a macro level concern but there has been less attention on the implications of this social objective for policies related to the management of individual resources this paper derives guidance for sector level planning and project analysis from a macro level norm of intergenerational fairness optimal sustainable management involves making tradeoffs between sectors we derive a criteria for sector level planning and project analysis that help make those tradeoffs without losing site of the sustainability goal

the hartwick rule myths and facts we shed light on the hartwick rule for capital accumulation and resource depletion by providing semantic clarifications and investigating the implications and relevance of this rule we extend earlier results by establishing that the hartwick rule does not indicate sustainability and does not require substitutability between man made and naturalcapital we use a new class of simple counterexamples i to obtain the novel finding that a negative value of net investments need not entail that utility is unsustainable and ii to point out deficiencies in the literature