public versus private investment in human capital endogenous growth and income inequality in this paper we present an overlapping generations model with heterogeneous agents in which human capital investment through formal schooling is the engine of growth we use simple functional forms for preferences technologies and income distribution to highlight the distinction between economies with public education and those with private education we find that income inequality declines more quickly under public education on the other hand private education yields greater per capita incomes unless the initial income inequality is sufficiently high we also find that societies will choose public education if a majority of agents have incomes below average

a brain gain with a brain drain abstract we study human capital depletion and formation in an economy open to out migration as opposed to an economy which is closed under the assumption of asymmetric information the enlarged opportunities and the associated different structure of incentives can give rise to a brain gain in conjunction with a brain drain migration by high skill members of its workforce notwithstanding the home country can end up with a higher average level of human capital per worker

a diagrammatic exposition of weak complementarity and the willig condition this article provides a graphical explanation for one of the most important restrictions to utility functions used in revealed preference approaches for measuring the demand for public goods and product quality weak complementarity it also describes how the willig condition is an important element along with weak complementarity in measuring hicksian consumer surplus for changes in public goods or quality using marshallian demand curves

estimating the general equilibrium benefits of large changes in spatially delineated public goods the purpose of this article is to report a new approach for measuring the general equilibrium willingness to pay for large changes in spatially delineated public goods such as air quality we estimate the parameters of a locational equilibrium model and compute equilibria for alternative scenarios characterizing the availability of public goods within a system of communities welfare measures take into consideration the adjustments of households in equilibrium to nonmarginal changes in public goods the framework is used to analyze willingness to pay for reductions in ozone concentrations in southern california between 1990 and 1995

human capital depletion human capital formation and migration a blessing or a curse abstract we specify conditions under which a strictly positive probability of employment in a foreign country raises the level of human capital formed by optimizing workers in the home country while some workers migrate taking along more human capital than if they had migrated without factoring in the possibility of migration a form of brain drain other workers stay at home with more human capital than they would have formed in the absence of the possibility of migration a form of brain gain

natural resource economics and conservation contributions of agricultural economics and agricultural economists research by agricultural economists on natural resources has been distinguished by an interdisciplinary emphasis and a dynamic perspective it has recognized technological and institutional constraints has been oriented toward solving concrete resource management and policy problems and has emphasized empirical and quantitative analysis agricultural economists have introduced methods for evaluating natural resource conservation efforts for predicting adoption of resource conservation technologies and for designing efficient and sustainable resource management policies they have identified ways of improving land management and preventing land degradation proposed reforms of institutions governing water allocation and water quality and introduced policies for balancing environmental and efficiency considerations in the management of pests biodiversity and livestock diseases their research has had substantial impacts on the formulation of resource conservation policies

krutilla s legacy twenty first century challenges for environmental economics we all need heroes in academic life their ideas capture our imaginations convincing us that a set of problems is important often they are role models and mentors to young scholars certainly the academic enterprise would be less exciting and less productive without them this past year environmental economics lost john krutilla one of its founding fathers and a person i have always regarded as an academic hero few people have influenced environmental economics more than john it has now been fifteen years since his last major book was published bowes and krutilla and nearly forty years since the article conservation reconsidered that most environmental economists associate with him appeared in the aer a short recognition of his work prepared by resources for the future includes a comment by nobel laureate robert solow that captures the impact of this paper he observed that

evaluation of nonmarket goods recovering unconditional preferences a new approach is proposed for the evaluation of nonmarket goods starting from a complete or incomplete conditional demand system for market goods which is observable and depends on nonmarket goods this information is not sufficient to recover the underlying preference ordering of the representative consumer the central idea is to employ additional marginal willingness to pay functions for the nonmarket goods since they can be estimated either together with the demand system or in a separate step they are less arbitrary than the assumptions or hypotheses usually made if the entire system is weakly integrable the underlying ordering and appropriate welfare measures can be derived in this article i investigate the relationship between conditional and unconditional demand systems present sufficient conditions for weak integrability and demonstrate the practicability of the procedure proposed by means of three examples

public versus private education when differential fertility matters we assess the merits of different education systems in a framework that accounts for the joint decision problem of parents regarding fertility and education specifically we compare the implications of a public and a private schooling regime for economic growth and inequality we find that private schooling leads to higher growth when there is little inequality in human capital endowments across families in contrast when inequality is high public education yields higher growth by reducing fertility differentials in addition public schooling leads to income convergence while private schooling can result in ever increasing inequality our analysis highlights theimp ortanceof accounting for endogenous fertility differentials when analyzing educational policies

brain drain and economic growth theory and evidence we focus on the impact of migration prospects on human capital formation and growth in a small open developing economy we assume that agents are heterogeneous in skills and take their educational decisions in a context of uncertainty regarding future migrations we distinguish two growth effects an ex ante brain effect migration prospects foster investments in education because of higher returns abroad and an ex post drain effect because of actual migration flows the case for a beneficial brain drain bbd emerges when the first effect dominates i e when the average level of human capital is higher in the economy opened to migrations than in the closed economy we derive the theoretical conditions required for such a possibility to be observed using cross section data for 37 developing countries we find that the possibility of a bbd could be more than a theoretical curiosity

dynamic equilibrium in markets for perennial crops a dynamic equilibrium model for perennial crop markets is formulated price expectations are formed according to perfect foresight and both the age composition of the crop and the optimal rotation are determined endogenously the model is applied to the california alfalfa market the calculated long run equilibrium acreage is quite close to average acreage over the base period the results also exhibit cyclical fluctuations in acreage with a six percent coefficient of variation thus cyclical behavior can arise from technical characteristics of the production process as well as from imperfectly formed expectations or random exogenous shocks

an analysis of rubber supply in sri lanka an analysis of the supply response for perennial crops is undertaken for rubber in sir lanka focusing on the uprooting replanting decision and disaggregating the typical reduced form supply response equation into several structural relationships this approach is compared and contrasted with dowling s analysis of supply response for rubber in thailand which is based upon a sophisticated reduced form supply function developed by wickens and greenfield for brazilian coffee because the uprooting replanting decision is central to understanding rubber supply response in sri lanka and for other perennial crops where replanting activities dominate new planting the standard approaches do not adequately capture supply response

inducing patterns of correlation and substitution in repeated logit models of recreation demand repeated logit models are among the most commonly applied methods for modeling seasonal recreation demand in this article we examine the capabilities of the repeated nested logit and repeated mixed logit models to capture patterns of error correlation and demand substitution particular attention is paid to the use of the mixed logit framework to generalize the strong assumptions on correlation patterns across sites and choice occasions imbedded in the nested logit model we examine the implications for the range of price elasticities allowed in both models based on the implied correlation structures copyright 2002 oxford university press

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

the substantial bias from ignoring general equilibrium effects in estimating excess burden and a practical solution we show that under typical conditions the simple excess burden triangle formula substantially underestimates the excess burden of commodity taxes in some cases by a factor of 10 or more this formula performs poorly because it ignores general equilibrium interactions most important interactions between the taxed commodity and the labor market many prior studies have shown that general equilibrium interactions affect excess burden but have not appreciated the bias associated with ignoring these interactions or the quantitative importance of this bias we derive an implementable alternative to the simple formula this alternative formula captures interactions that the simple formula omits as a result it is both unbiased and usually more accurate

can a brain drain be good for growth in the source economy this paper analyzes the interaction between income distribution human capital accumulation and migration it shows that when migration is not a certainty a brain drain may increase average productivity and equality in the source economy even though average productivity is a positive function of past average levels of human capital in an economy it is also shown how the temporary possibility of emigration may permanently increase the average level of productivity of an economy

what s the use welfare estimates from revealed preference models when weak complementarity does not hold abstract in this paper we consider the theoretical and empirical ramifications of welfare measurement in revealed preference models when weak complementarity does not hold in the context of a kuhn tucker model of recreation demand we show that while it is possible to estimate preferences that do not appear to exhibit weak complementarity the calculation of welfare measurements from these models requires a cardinal interpretation of preferences that cannot be tested furthermore we reiterate the under appreciated fact that even traditional use value estimates require a cardinal restriction on preferences that while often intuitive also cannot be tested we demonstrate empirically that the choice of restrictions can have significant ramifications as use value estimates can vary based on the assumed preference structure

the economics of climate change and the theory of discounting this paper confronts the theory of discounting with climate change economics standard discounting would give long term damages a very low present value on the other hand low discount rates would imply more sacrifices for present generations although future generations may be richer and using multiple rates would lead to economic inefficiencies the paper first shows that arguments favouring a low or zero discount rate in general are weak even from an ethical point of view it goes on by considering different arguments in favour of discount rates decreasing over time and by recalling the argument that non reproducible environmental assets should be given a value growing over time through the example of climate change it finally shows that the latter argument not only implies that the costs of damages associated to climate change should not be underestimated but also reinforce the legitimacy of using decreasing discount rates

does school quality matter returns to education and the characteristics of public schools in the united states this paper estimates the effects of school quality measured by the pupil teacher ratio average term length and relative teacher pay on the rate of return to education for men born between 1920 and 1949 using earnings data from the 1980 census we find that men who were educated in states with higher quality schools have a higher return to additional years of schooling rates of return are also higher for individuals from states with better educated teachers and with a higher fraction of female teachers holding constant school quality measures however we find no evidence that parental income or education affects average state level rates of return

globalization brain drain and development this paper reviews four decades of economics research on the brain drain with a focus on recent contributions and on development issues we first assess the magnitude intensity and determinants of the brain drain showing that brain drain or high skill migration is becoming a dominant pattern of international migration and a major aspect of globalization we then use a stylized growth model to analyze the various channels through which a brain drain affects the sending countries and review the evidence on these channels the recent empirical literature shows that high skill emigration need not deplete a country s human capital stock and can generate positive network externalities three case studies are also considered the african medical brain drain the exodus of european scientists to the united states and the role of the indian diaspora in the development of india s information technology sector we conclude with a discussion of the implications of the analysis for education immigration and international taxation policies in a global context

a theory of intergenerational clubs intertemporal pareto efficient conditions for provision and maintenance of the shared good tolls membership size and financing are presented for intergenerational clubs an optimal membership span is also determined for nonlifetime members these pareto efficient conditions account for atemporal crowding intertemporal depreciation due to utilization and the sequence of members adequate incentives exist for privately owned clubs to act with foresight but do not necessarily exist for government owned clubs nevertheless privately owned clubs must be operated by a firm rather than the members if free rider problems regarding maintenance are to be avoided

international migration under asymmetric information international migration under asymmetric information usually differs from international migration under symmetric information and often quite dramatically so and in counterintuitive ways since in real life information is indeed asymmetric it is somewhat surprising that hitherto the study of international migration has by and large proceeded without explicit recognition of the effect of informational asymmetry in this paper we show that when at the lowest skill level migration is desirable i e if the discounted wage differential is positive for the lowest skill level the introduction of asymmetric information results in a reduction of the quality and quantity of international migration or has no effect at all when at the lowest skill level migration is not desirable the discounted differential is not positive at the lowest skill level the introduction of asymmetric information may either result in migration by all or none when under asymmetric information workers can at some cost to themselves report to foreign employers their individual skill thus dissociate themselves from the group effect then provided the cost is small either a u pattern of migration with respect to skill level emerges or migration is uniformly pursued by all though some do and some do not invest in signalling when the source consists of more than 1 poor country it is impossible to predict migration under asymmetric information from a given country without explicitly accounting for changes in the parameters of the other for example a favorable change encouraging less migration taking place in 1 country will through a distinct impact on the overall composition of migration reduce migration from the other country finally allowing employers to discover after a while the true productivity of individual migrant workers we obtain the somewhat surprising result that under a reasonable set of assumptions eventual discovery may increase the quantity and quality of migration and also increase the wage enjoyed by the low quality migrants eventual discovery serves to mitigate the impact of group averaging that deters migration by the high skill workers due to migration of some such workers the prediscovery wage of the low skill workers arises in our case sufficiently to outweigh the effect of the future wage decline due to discovery authors

a brain gain or a brain drain migration endogenous fertility and human capital formation i introduction it is traditionally argued that openness to international migration within a developing country can cause high skilled workers to emigrate and thereby create a brain drain problem 1 however it has been demonstrated in recent studies that such openness to international migration raises the return on human capital in a developing country which in turn raises the average level of human capital in the source country 2 this article revisits this issue building on the prior studies by examining the impact of migration on economic growth through the role of human capital there are however three features that distinguish this article from the prior works first of all while most of the prior studies on migration have tended to focus solely on static models so as to simplify their analyses we develop a dynamic model of migration within which endogenous growth is generated 3 this dynamic model enables us to study the dynamic behavior of the economy and to separate the short run effects from the long run effects when there are changes in migration policy an endogenous growth model is constructed in this article to allow for the persistent growth of a source country hence we contribute to two strands of the literature international migration and the endogenous growth model we also show that under certain conditions the balanced growth path bgp may exist to the best of our knowledge this is the first article to consider the possibility of the bgp within a migration model second we endogenize the fertility choice within the model it is already widely acknowledged that fertility and education are interdependent decisions for parents indeed becker murphy and tamura 1990 developed a model to examine the way s in which the joint decisions on fertility and education affect economic growth while the linkage between growth and inequality was subsequently explored when differential fertility matters by de la croix and doepke 2003 however the studies on migration have tended to assume a constant population growth rate and have generally not taken into account fertility decisions examples include rodriguez 1975 and mountford 1997 both of which presented dynamic models to study the issues of migration and economic growth in both cases population was taken as an exogenous variable and was assumed to grow at a constant rate in this article we allow parents to make fertility and education decisions and to have an opportunity to migrate to a foreign country internalizing fertility decisions induces a trade off between the quality and the quantity of children when there are changes in migration policy this trade off will then have an effect on economic growth as a result of its direct effect on the accumulation of human capital fertility does matter when considering an economy with heterogeneous agents since it will also affect the structure of the labor force third we include the average costs involved in preparing each migrating child to overcome the various barriers when migrating to foreign countries with different backgrounds languages and cultures a static model with migration costs such as language skills preparation was developed by lien and wang 2005 in which they found that when including such costs the openness to international migration may well create a brain drain since it is quite common for the governments of developing countries to encourage their citizens to migrate to certain foreign countries the inclusion of the costs of migration allows us to study the impact of these policies we develop a migration model within which agents differ from one another based upon their different endowments of human capital considering two alternative scenarios to facilitate our examination of the effects of migration on economic performance in the first scenario we consider the case where the host country cannot differentiate between the abilities of the migrants as a result of asymmetric information between the host country and the migrants

weak complementarity path independence and the intuition of the willig condition abstract weak complementarity is usually invoked for valuing public goods using information on private goods however using uncompensated demands requires a second condition the willig condition this paper present an intuitive explanation of the willig condition and shows that the alternative versions are equivalent to a path independence condition for line integrals this condition is fulfilled for compensated demands but not uncompensated demands except in restrictive special cases it is shown that this is a type of quasi homotheticity and requires that the income flexibility of quality must equal the income elasticity of the weak complement the importance and restrictiveness of the willig condition are shown using three alternative functional forms

recovering weakly complementary preferences abstract this paper demonstrates a method for recovering weakly complementary expenditure and indirect utility functions while integrating back from marshallian demand specifications that do not intrinsically embody weak complementarity weak complementarity of a good with quality provides information about how the constant of integration over price must behave with respect to quality and this information can be incorporated into the process of recovering preferences the weakly complementary expenditure and indirect utility functions are recovered for the linear demand specification and for the stone geary utility function with any value of the subsistence parameter

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

the brain drain and the world distribution of income abstract skilled emigration or brain drain from developing to developed countries is becoming the dominant pattern of international migration today such migration is likely to affect the world distribution of income both directly through the mobility of people and indirectly as the prospect of migration affects the rate of return to education in both the sending and receiving economies this migration pattern will therefore affect human capital accumulation and fertility decisions in both the sending and receiving economies this paper analyzes these effects in a dynamic two country model of the world economy where agents in both countries make optimal fertility and human capital decisions the implications of the analysis for the world distribution of income are derived in the light of recent empirical findings of the brain drain literature the analysis shows that the current trend towards predominantly skilled emigration from poor to rich countries may in the long run increase inequality in the world distribution of income as relatively poor countries grow large in terms of population in the short run however it is possible for world inequality to fall due to rises in gdp per capita in large developing economies with sufficiently low skilled emigration rates

depletion of the environmental basis for renewable resources the economics of interdependent renewable and nonrenewable resources abstract this paper synthesizes familiar theories of nonrenewable and renewable resource economics in a two sector partial equilibrium analysis of efficient trade offs between renewable resource production and environmental development the irreversible impacts of coastal zone development provide a motivating example while development proceeds the efficient harvest of renewable resources may exceed the sustainable rate while development may involve several periods of growth and decline once development begins it proceeds without significant interruptions if a profitable renewable sector survives development ceases before exhausting all profitable opportunities interdependent stocks reduce distinctions between resource types because each sector exhibits features of the other

inequality and growth why differential fertility matters we argue that inequality and growth are linked through differential fertility and the accumulation of human capital we build an overlapping generations model in which dynasties differ in their initial endowment with human capital growth the income distribution and fertility are endogenous due to a quantiy quality tradeoff families with less human capital decide to have more children and invest less in education when initial inequality is high large fertility differentials lower the growth rate of average human capital since poor families who invest little in education make up a large fraction of the population in the next generation a calibrated model shows that this fertility differential effect is quantitatively important we also provide empirical evidence to confirm the links between inequality differential fertility and growth suggested by the model

inducing human capital formation migration as a substitute for subsidies abstract when productivity is fostered by an individual s own human capital as well as by the economy wide average level of human capital individuals under invest in human capital the provision of subsidies for the formation of human capital conditional on the subsidy being self financed by tax revenues can bring the economy to its socially optimal level of human capital yet a strictly positive probability of migration to a richer country by raising both the level of human capital formed by optimizing individuals in the home country and the average level of human capital of non migrants in the country can enhance welfare and nudge the economy toward the social optimum indeed under a well controlled restrictive migration policy the welfare of all workers is higher than in the absence of this policy

perennial crop supply response a kalman filter approach a state space model for perennial crop supply response is developed new plantings and removals depend on the existing age structure of the crop and expected values for future prices and other exogenous variables acreage in individual age categories evolves depending upon existing acreage new plantings and removals the kalman filter and an iterative parameter search provide maximum likelihood estimates of the unknown parameters and age group acreages from observed data on total acreage and production an empirical application for alfalfa shows that existing acreage has differential impacts on new plantings and removals depending upon age

migration as an antidote to rent seeking abstract we develop a new mechanism through which skilled migration may influence economic performance in the sending country if agents can choose between acting as rent seekers and engaging in productive activities and only productive skills are exportable a positive probability of migration to a more secure economy reduces the relative expected returns from rent seeking thus decreasing the proportion of skilled workers who opt for parasitic activities such an improvement in the allocation of talent may prevail over the loss of skilled workers due to outmigration however we show that this result is not robust to the introduction of endogenous protection if productive workers share their resources between accumulation of productive capital and investment in security prospective migration may induce a weaker protection against rent seeking which in turn might depress average income in the source economy