how should control theory be used to calculate a time consistent government policy we study different solutions to a simple one dimensional linear quadratic game with a large number of private agents and a government a time consistent solution is defined as a solution to the hamilton jacobi bellman equation i e as a policy for which the government has noprecommitment capability this solution is compared to a policy where the government has an instantaneous pre commitment i e an equilibrium in which the government has a period by period leadership in both cases we show how control theory should be applied to calculate the equilibrium and how to relate these equilibria to the differential game literature

intertemporal equilibrium and the transfer paradox the transfer paradox may occur in a world with only two countries at a dynamically stable intertemporal competitive equilibrium in a framework of overlapping generations with production and investment a transfer of income may immiserize the recipient while enriching the donor away from the golden rule a transfer may result in a pareto improvement

a cross country comparison of rural income generating activities summary this paper uses a newly constructed cross country database composed of comparable income aggregates to examine the full range of income generating activities carried out by rural households the analysis paints a clear picture of multiple activities across rural space in countries on all four continents though less so in the included african countries for most countries the largest share of income stems from off farm activities and the largest share of households has diversified sources of income diversification not specialization is the norm nevertheless agricultural sources of income remain critically important for rural livelihoods in all countries

labor market performance as a determinant of migration in a comparison of migrants with nonmigrants both observed and unobservable productivity factors are relevant this paper focuses more on the unobservable factors and their correlation between places of origin and destination a human capital model of migration demonstrates that more productive workers at the origin would choose to migrate only if the correlation between origin and destination factors is strongly positive longitudinal data drawn from the cote d ivoire living standards survey 1985 86 are used to examine the pattern of migration in the light of labor market performance both of wage employees and non farm self employed workers it is found that indeed the more productive workers migrate furthermore the general direction of migration is toward cities the conclusion is therefore that rural areas lose their productive workers and that urban areas may gain in productivity from the geographical shifts in population

absorbing a windfall of foreign exchange dutch disease dynamics abstract the permanent income rule is seldom the optimal response to a windfall of foreign exchange such as that from a resource discovery absorptive capacity constraints require domestic investment and investment in structures requires non traded inputs the supply of which is constrained by the initial capital stock this particularly when combined with intra sectoral capital immobility delays adjustment and creates short run dutch disease symptoms as the real exchange rate sharply appreciates and overshoots its long run value optimal revenue management requires investing in the domestic non traded goods sector and a slow build up of consumption accumulation of foreign assets adjusts to accommodate the time paths of domestic consumption and investment

aid allocation rules abstract this paper studies an aid allocation rule used by major development agencies and investigates optimal allocations when recipients are neoclassical economies undergoing transition dynamics when recipients face aid absorption constraints allocations that favor poorer recipients are not always optimal contrary to what is assumed in assessments of donor performance the most quantitatively significant factors that determine the optimal sensitivity to recipient characteristics are the generosity of the aid budget and the extent of absorption constraints in neoclassical recipients aid can only accelerate growth where there is already growth so the optimal rule places little weight on growth and optimality is largely a matter of balancing recipient need against absorption constraints

competition for aid and trade policy this paper considers the optimal allocation of a given amount of foreign aid between two recipient countries it is shown that given consumer preferences a country following a more restrictive trade policy would receive a smaller share of the aid if the donor country maximises its own welfare in allocating aid if on the other hand the donor country allocates aid in order to maximize the sum of the welfare of the two recipient countries the result is just the opposite finally we analyze the situation where the recipient countries compete with each other for the given amount of aid it is shown that this competition tends to lower the level of optimal tariffs in the recipient countries

whom do high growth firms hire we study employment and new hires among high growth firms hgfs in the swedish knowledge intensive sectors 1999 2002 using matched employer employee data we find that hgfs are more likely to emp

school attendance child labour and remittances from international migration in el salvador abstract international migrant remittances can increase household budget and reduce liquidity constraint problems generating consumption and investment opportunities for recipient households in particular remittances can enable investing in children s human capital and reduce child labour key outcomes from the perspective of growth in a developing country using data for el salvador this article shows a a null or insignificant overall impact of remittances on schooling b a strong reduction of child wage labour in remittance recipient households and c an increase in unpaid family work activities for children in those households moreover the evidence shows important differences by gender and age of the child in consideration while girls seem to indeed increase school attendance upon remittance receipts by reducing labour activities boys do not benefit on average from higher schooling but some time substitution takes place favouring family work activities over paid jobs and among secondary sc

intercountry comparisons of labor force trends and of related developments an overview this paper is a survey of analyses of women s labor force growth in 12 industrialized countries originally presented at a conference in sussex england in june 1983 the main focus of the conference papers and of the current survey is on growth of the labor force of married women in the years 1960 80 trends in fertility wages and family instability also receive attention as related developments married women s labor force growth is observed in all countries except for the ussr after 1970 where labor force rates of women reached the level of men growth rates differ among countries they apparently respond to growth in real wages and to growth in education but response elasticities differ among countries estimates of these elasticities contained in the country papers were helpful in predicting the trends other findings include ubiquitous declines in fertility and growth of divorce in the 1970s both developments are related to long run labor force growth in all countries wages of women were lo

foreign influence and welfare how do foreign interests inuence the policy determination process what are the welfare implications of such foreign inuence in this paper we develop a model of foreign inuence and apply it to the study of optimal taris we develop a two country voting model of electoral competition where we allow the incumbent party in each country to take costly actions that probabilistically aect the electoral outcome in the other country we show that policies end up maximizing a weighted sum of domestic and foreign welfare and we study the determinants of this weight we show that although foreign inuence is zero in equilibrium its threat may be welfare enhancing from the point of view of aggregate world welfare this is because foreign inuence helps alleviate externalities arising from cross border eects of policies the threat of foreign inuence can however prove harmful in the presence of large imbalances in inuence power across countries we apply our model of foreign inuence to the study of optimal trade policy we derive a modied formula for the optimal import tariand show that a country s import tariis more distorted whenever the inuenced country is small relative to the inuencing country and whenever natural trade barriers between the two countries are small

spillovers from high growth firms evidence from hungary how do high growth firms hgfs affect the rest of the economy we explore this question using hungarian administrative microdata relying on the birch definition of hgfs we find evidence for stronger productivity growth for firms operating in industries with more hgfs and for firms supplying industries with more hgfs knowledge spillovers or the surge of hgfs demand for intermediate inputs could explain these positive associations firms with intermediate productivity levels seem most likely to benefit from this effect while we find no differences by age or export status the results hold irrespective of the level of spatial aggregation and are robust to alternative definitions of hgfs as well as different measures of productivity or spillover

foreign aid and domestic absorption this paper introduces a new supply push instrument for foreign aid to be used together with an instrumental variable estimator that filters out unobserved common factors we use this instrument to study the effects of aid on macroeconomic ratios and especially the ratios of consumption investment imports and exports to gdp we cannot reject the hypothesis that aid is fully absorbed rather than used to build foreign reserves or exiting as capital flight nor do we find evidence of dutch disease effects aid leads to higher consumption while the evidence that it promotes investment is less robust

the ghost of financing gap testing the growth model used in the international financial institutions abstract the harrod domar growth model supposedly died long ago still today economists in the international financial institutions ifis apply the harrod domar model to calculate short run investment requirements for a target growth rate they then calculate a financing gap between the required investment and available resources and often fill the financing gap with foreign aid the financing gap model has two simple predictions 1 aid will go into investment one for one and 2 there will be a fixed linear relationship between growth and investment in the short run the data soundly reject these two predictions of the financing gap model

migration from nicaragua some recent evidence abstract i utilize two unique data sources to examine migration from and remittance flows to the capital city of managua nicaragua approximately 10 12 of the population has emigrated these emigrants tend to be disproportionately of working age better educated and more often white collar workers than nonmigrants in addition emigrants are more likely to come from larger premigration households and higher income households remittance flows to managua are quite large the second largest source of foreign exchange earnings after coffee in addition remittances have a negative income effect on labor force participation and a positive effect on self employment of nonmigrants

economic transformation population growth and the long run world income distribution abstract we present and calibrate a model where trade with advanced economies spurs development and trade opportunities depend on the relative population in advanced and developing countries as developing countries become advanced prospects improve for the remaining developing countries if population growth differentials between developing and advanced economies are small economic development accelerates over time otherwise long run global prosperity requires a sufficiently large initial population in advanced countries more open countries develop faster but more openness by all developing countries may only modestly increase their aggregate growth china s development may hurt developing countries in the short run but improves their long run prospects

debt relief for poor countries conditionality and effectiveness this paper studies the effectiveness of debt relief to stimulate economic growth in the most heavily indebted poor countries we develop a neoclassical framework with a conflict of interest between the altruistic donor and the recipient government and model conditionality as an imperfectly enforceable dynamic contract in contrast to the recent practice of fully cancelling debt optimal incentive compatible conditionality is accompanied by a concessionality level that implies a combination of subsidized loans and outright grants the optimal concessionality level depends on the recipient s access to international financial markets and on the strength of the conflict of interest incentive compatible transfers with optimal concessionality levels generate substantial welfare gains if the donor does not implement the optimal concessionality level and provides subsidized loans only then the effectiveness of transfers decreases in the long run with severe welfare implications in contrast transfers are less effective in the short run if the donor offers outright grants only

the limitations of decentralized world redistribution an optimal taxation approach abstract a centralized scheme of world redistribution that maximizes a border neutral social welfare function subject to the disincentive effects it would create generates a drastic reduction in world consumption inequality dropping the gini coefficient from 0 69 to 0 25 in contrast an optimal decentralized i e with no cross country transfers redistribution has a miniscule effect on world income inequality thus the traditional public finance concern about the excess burden of redistribution cannot explain why there is so little world redistribution actual foreign aid is vastly lower than the transfers under the simulated world income tax suggesting that voluntary world transfers subject to a free rider problem produces an outcome that is consistent with rich countries such as the united states either placing a much lower value on the welfare of foreigners or else expecting that a very significant fraction of cross border transfers is wasted the product of the welfare weight and one minus the share of transfers that are wasted constitutes the implicit weight that the united states assigns to foreigners we calculate that value to be as low as 1 2000 of the value put on the welfare of an american suggesting that u s policy is consistent with social preferences that place essentially no value on the welfare of the citizens of the poorest countries or that implicitly assumes that essentially all transfers are wasted

aid policies and growth the authors of this paper use a new database on foreign aid to examine the relationships among foreign aid economic policies and growth of per capita gdp in panel growth regressions for 56 developing countries and 6 four year periods 1970 93 they find that the policies that have a great effect on growth are those related to fiscal surplus inflation and trade openness they construct an index for those three policies and have that index interact with foreign aid they have instruments for both aid and aid interacting with policies they find that aid has a positive impact on growth in developing countries with good fiscal monetary and trade policies in the presence of poor policies aid has no positive effect on growth this result is robust in a variety of specifications which include or exclude middle income countries include or exclude outliers and treat policies as exogenous or endogenous they examine the determinants of policy and find no evidence that aid has systematically affected policies either for good or for ill they estimate an aid allocation equation and show that any tendency for aid to reward good policies has been overwhelmed by donors pursuit of their own strategic interests in a counterfactual they reallocate aid reduce the role of donor interests and increasing the importance of policy such a reallocation would have a large positive effect on developing countries growth rates

convergence clubs and subsistence economies abstract this paper focuses on one possible explanation for the empirical evidence of a income convergence among the world s poorest countries and among its wealthiest countries and b income divergence among most of the remaining countries the model incorporates the assumption of subsistence consumption into the neoclassical exogenous growth model yielding outcomes that are consistent with the convergence divergence empirical evidence while subsistence consumption can lead to negative saving and disaccumulation of capital it can also coincide with positive saving and accumulation of capital the model predicts that the poorer the country the lower its saving rate a result that also appears to be borne out by the evidence provided here

high growth firms introduction to the special section high growth firms hgfs have attracted considerable attention recently as academics and policymakers have increasingly recognized the highly skewed nature of many metrics of firm performance a small number of hgfs drives a disproportionately large amount of job creation while the average firm has a limited impact on the economy this article explores the reasons for this increased interest summarizes the existing literature and highlights the methodological considerations that constrain and bias research this special section draws attention to the importance of hgfs for future industrial performance explores their unusual growth trajectories and strategies and highlights the lack of persistence of high growth consequently while hgfs are important for understanding the economy and developing public policy they are unlikely to be useful vehicles for public policy given the difficulties involved in predicting which firms will grow the lack of persistence in high growth levels and the complex and often indirect relationship between firm capability high growth and macro economic performance

the rural non farm sector issues and evidence from developing countries abstract the rural non farm sector has traditionally been viewed as a low productivity sector which produces low quality goods it is often expected to wither away as a country develops recent years have seen a shift away from this position towards recognition that the rural non farm sector can and often does contribute to economic growth rural employment poverty reduction and a more spatially balanced population distribution this paper reviews the literature on the conceptual and empirical underpinnings of this more recent perspective focussing on the experience in developing countries the paper documents the size and heterogeneity of the sector pointing to evidence that in many countries the sector is expanding rather than declining the issues associated with measuring the sector s economic contribution are discussed followed by empirical assessments for several countries and regions the distributional impact of non farm earnings is examined and it is found that a pro poor impact while by no means inevitable can be considerable the sector s trajectory over time in different settings is reviewed and the scope for and experience of various policy interventions is discussed

paradoxes associated with the administration of foreign aid abstract this paper shows that if because of administration costs or other wastes only a proportion of an aid reaches the recipient then it is possible that the donor is enriched by its act of charity the extent of the enrichment increasing with the extent of the leakage and or that the recipient is impoverished by aid the extent of the impoverishment increasing with the extent of the leakage these outcomes are possible even when trade is optimally restricted by donor or recipient

the dynamic implications of foreign aid and its variability abstract the paper examines the effects of aid and its volatility on consumption investment and the structure of production in the context of an intertemporal two sector general equilibrium model calibrated using data for aid dependent countries in africa a permanent flow of aid mainly finances consumption rather than investment consistent with the historical failure of aid inflows to translate into sustained growth large aid flows are associated with higher real exchange rates and smaller tradable sectors because aid is a substitute for tradable consumption aid volatility results in substantial welfare losses providing a motivation for recent discussions of aid architecture stressing the need for greater predictability of aid these results are also consistent with evidence from cross country regressions of manufactured exports presented later in the paper

economic development as self discovery in the presence of uncertainty about what a country can be good at producing there can be great social value to discovering costs of domestic activities because such discoveries can be easily imitated we develop a general equilibrium framework for a small open economy to clarify the analytical and normative issues we highlight two failures of the laissez faire outcome there is too little investment and entrepreneurship ex ante and too much production diversification ex post optimal policy consists of counteracting these distortions to encourage investments in the modern sector ex ante but to rationalize production ex post we provide some informal evidence on the building blocks of our model

the new economics of labor migration this paper reviews selected theoretical and empirical developments in the field of labor migration economics the migration behavior of individuals differs in accordance with their perceived relative deprivation those who are relatively more deprived tend to have stronger incentive to migrate than those who are relatively less deprived moreover a reference group characterized by more income inequality is likely to generate more relative deprivation highly skilled workers are also more likely to migrate migration decisions are often made jointly by the migrant and nonmigrant with a contractual arrangement regarding the sharing of costs and returns the exchange of commitments to share income provides coinsurance of particular interest are the determinants of the speed of adoption of migration as an innovation and the characteristics associated with the delay in the adoption of innovation new econometric techniques including techniques for the analysis of qualitative dependent variables techniques that correct for sample selection bias and those for the analysis of longitudinal data have substantially benefited empirical research in this area new methods that can correct for the biased estimate of the wages particular individuals would receive at 2 or more locations at the same point in time allow researchers to test locational decsion making models estimates of these structural models of labor migration support the hypothesis that individuals respond to income incentives in making the decsion to migrate further research is needed on the pazzling observation that migrant workers earn less than native born workers with similar characteristics during the 1st few years after migration but more thereafter other topics that need further research include the macroeconomic effects of migration the microeconomic and macroeconomic relationships between aging and labor migration and the migration behavior of dual earner families

on migration and risk in ldcs the authors develop the hypothesis that aversion to risk rather than expectations of higher income is the primary motivation for rural urban migration in developing countries this hypothesis maintains that an optimizing risk averse small farmer family will try to place a family member in the urban sector in order to diversify its income portfolio an additional hypothesis related to risk is also considered at the individual rather than the family level annotation

income strategies among rural households in mexico the role of off farm activities abstract off farm activities generate on average more than half of farm households incomes in the mexican ejido sector participation in these activities helps reduce poverty and contributes to greater equality in the distribution of income this paper analyzes the determinants of access to off farm sources of income across households we find that education plays a major role in accessing better remunerated nonagricultural employment adults of indigenous ethnic origin suffer from an educational lag and have less access to off farm nonagricultural employment than non indigenous adults at identical educational levels the regional availability of off farm employment strongly affects participation in addition women are differentially limited by distance to urban centers in their ability to gain off farm employment

migration and incomes in source communities a new economics of migration perspective from china the objective of this paper is to understand the effects of china s migration on source communities and to discuss their policy implications we draw from new economics of labor migration nelm theory to understand how migration and migrant remittances can relax or tighten market constraints in china s rural economy using simultaneous equation econometric techniques and household survey data from china we estimate net sectorspecific effects of migration on rural household income focusing on farm production and self employment our econometric findings indicate that the loss of labor to migration has a negative effect on household cropping income in source areas however we provide evidence that remittances sent home by migrants positively compensate for this lost labor effect contributing to household incomes directly and indirectly by stimulating crop and possibly self employment production this finding offers evidence in support of the nelm hypothesis that remittances loosen constraints on production in the imperfect market environments characterizing rural areas in less developed countries taking into account both the multiple effects of migration and the change in household size participating in migration increases household per capita income between 14 and 30 percent migration and incomes in source communities a new economics of migration perspective from china china is experiencing the largest peacetime flow of labor out of agriculture ever witnessed in world history solinger 1999 rozelle et al 1999 despite the rapid expansion of labor migration china s work force is still disproportionately employed in agriculture compared to other countries at similar levels of per capita gdp taylor and martin 2001 hence as china s economy continues to expand the flow of labor to urban areas will continue and even accelerate johnson 1999 the massive flow of labor away from farms has intensified research interest in china s migration in recent years however as in the broader literature on migration in less developed countries most recent studies on china s migration have focused on determining the size and composition of the labor flow macroeconomic implications of increased migration and the effects of migration on urban areas zhao 1999 yang 1999 1997 less emphasis has been placed on researching the effects of migration on the rural communities that migrants leave even though evidence shows that the rural household in the village of origin is typically the central concern of all those involved in migration both those who leave and those who stay behind exceptions include wang and zuo 1999 bai 2001 moreover the recent increase in migration has left policy makers particularly concerned regarding the way source communities will be affected moa 1999 they are concerned that as labor flows away from farms food production and crop income will decline potentially threatening china s food security furthermore policy makers are concerned about the increasing gap between urban and rural household incomes if migration exacerbates this gap some fear that as it grows rural residents eventually will flood cities ill equipped to absorb them others fear that discontent over a rising urban rural income gap could even spill over into political unrest yang 1999 because china s markets and other modern economic institutions are still relatively undeveloped migration may play a pivotal role in creating or overcoming constraints caused by the lack of well functioning markets and or institutions knight and song 1999 benjamin and brandt 2000 the new economics of labor migration nelm literature analyzes migration as a household decision rather than as an individual decision stark 1991 the nelm hypothesizes that rural households facing imperfect market environments decide

migration remittances and male and female employment patterns little is known about the labor market impacts of workers remittances despite their magnitude in countries with considerable outmigration reports that families receiving international remittances severely curtail their work efforts are fairly common in the popular press e g robert frank 2001 yet we lack rigorous analyses of how male and female labor supplies respond to increases in remittance income to either support or refute these anecdotal observations according to the neoclassical model of labor leisure choice mark r killingsworth 1983 remittances a source of nonlabor income may lift budget constraints raise reservation wages and through an income effect reduce the employment likelihood and hours worked by remittance receiving individuals the receipt of remittances is usually preceded by the out migration of working aged household members however which may induce changes in the labor supply of nonmigrating household members in order to compensate for forgone income or to defray migration related expenses distinguishing the disruptive effect from the income effect of remittance inflows is problematic as most surveys do not contain detailed information on household outmigration and remittance receipt to the extent that these two effects are expected to have opposite impacts on labor supply however we can assess which effect dominates the impact of remittances on the decision to work has been previously examined by edgard rodriguez and erwin r tiongson 2001 in manila and by edward funkhouser 1992 in managua without accounting for the endogeneity of remittances with respect to labor supply they conclude that remittances reduce employment funkhouser also finds that remittances slightly increase self employment while informative these studies focus on the decision to work and do not consider that without altering employment rates remittances may change the hours worked and or the type of work performed in the receiving economy furthermore the impact may be different on male and female labor supplies and responsiveness to remittance income may vary from rural to urban areas using data from mexico a country with a large and growing remittance inflow we address the following questions how does the employment status and hours worked by men and women vary owing to international remittances do male and female labor supplies differ across various types of employment in rural versus urban areas due to higher remittance inflows

dots to boxes do the size and shape of spatial units jeopardize economic geography estimations this paper evaluates in the context of economic geography estimates the magnitude of the distortions arising from the choice of zoning system which is also known as the modifiable areal unit problem maup we consider three standard economic geography exercises the analysis of spatial concentration agglomeration economies and trade determinants using various french zoning systems differentiated according to the size and shape of spatial units which are the two main determinants of the maup while size matters a little shape does so much less both dimensions seem to be of secondary importance compared to specification issues

the effect of remittances on labour supply in the republic of haiti we examine the labour supply effect of remittances in the republic of haiti the prime international remittances recipient country in the latin american and caribbean lac region relative to its gdp unlike previous empirical literature we address three econometric issues that may bias the estimates we account for endogeneity of the remittances with respect to labour supply for the zero inflated nature of our dependent variable hours of work and for the self selection of the migrant sample our results are in line with previous literature and point to a decline of labour supply in the presence of remittances however contrary to previous findings the labour market response to remittances of female household heads is not as sensitive as male s

minimum wage and tax evasion theory and evidence the paper investigates the role of the minimum wage in a competitive economy in which there is underreporting of earnings by employed labour the minimum wage induces higher compliance by some lowproductivity workers and transforms a nominally neutral scal system into a regressive one a spike in the wage distribution at the minimum wage level appears and a positive correlation between the size of the spike and the size of the informal economy is predicted and documented using cross country data for europe a further result is that employees whose o cially declared earnings appear to be boosted by a minimum wage hike actually experience a decline in their true income this prediction nds support in an empirical test using the massive increase in the minimum wage that took place in hungary in 2001 as a quasi natural experiment

dynamic aid allocation abstract this paper introduces a framework for studying the optimal dynamic allocation of foreign aid among multiple recipients we pose the problem as one of weighted global welfare maximization a donor in the north chooses an optimal path for international transfers anticipating that consumption and investment decisions will be made by optimizing households in the south and accounting for limits in the extent to which recipients can effectively absorb aid we present quantitative results on optimal aid policy by applying our approach to a neoclassical growth model where the scope for aid funded growth is determined by the recipients distance from steady state

gradualism in aid and reforms abstract dynamic strategic interaction between an international donor and a recipient government is analyzed to review the efficacy of aid conditionality for governance reforms in ldcs it is shown that irrespective of whether the donor can fully commit to the aid program or not for maximal improvement in governance the aid should be disbursed in increments with each subsequent tranche being conditional on prior reforms demonstrating aid gradualism while the attraction of future aid incentivizes authorities to push through reforms these reforms in turn also make aid diversion less feasible further under full commitment the optimal aid package may involve offering scope for interim aid diversion to the elite for long term improvement in governance with such aid diversion being more likely to happen when the total aid budget is large with only partial commitment so that time consistency requires the donor to reconfigure aid in each round it is shown that a interim aid diversion is no longer viable and b both aid and reforms exhibit strong gradualism or what is known as the starting small and grow later principle in commitment models

remittance receipt and business ownership in the dominican republic using household level data from the dominican communities in the latin american migration project lamp dr7 we examine the links between remittance receipt and business ownership we find that while the existence of a family business attracts remittance inflows these monetary funds are associated with a reduced likelihood of business entrepreneurship these results are consistent with various hypotheses regarding remittances and business investments first remittances may be motivated by the availability of investment opportunities in the home community second remittances may respond to a bequest motive on the part of the emigrant who may wish to lay claim on family assets when returning home lastly remittances may cause an income effect that reduces family labour force participation and correspondingly the likelihood of family run business investments