temporary foreign workers and firms theory and canadian evidence abstract temporary foreign worker tfw programs have grown considerably in size when uncapped we develop a simple efficiency wage model to explain this phenomenon and examine the empirical evidence for it we also use the model to evaluate the implications of tfw programs for domestic workers in our framework firms that have been unable to find domestic workers may hire tfws at the wage previously advertised to domestic workers due to the lower outside option for tfws than domestic workers tfws will exert more effort for the same wage firms would thus prefer to hire otherwise identical tfws rather than domestic workers our model identifies an unintended consequence of a tfw program since the repercussions of a failed domestic job search are less severe if a tfw may be hired instead firms have an incentive to lower their wage offers made to domestic workers using canadian data we find that relative to domestic workers tfws work longer hours have lower rates of absenteeism and are less likely to be laid off consistent with higher effort in our model moreover for tfws from home countries with a relatively high outside option effort is lower than for tfws from other countries resume travailleurs etrangers temporaires et entreprises theorie et exemple canadien en l absence de plafonnement les programmes de travailleurs etrangers temporaires ptet se sont considerablement developpes afin d expliquer ce phenomene et d en examiner les preuves empiriques nous avons developpe un modele simple de salaire d efficience nous avons egalement utilise ce modele pour evaluer l incidence des ptet sur les travailleurs domestiques dans notre cadre d etude les entreprises peinant a trouver une main d uvre locale peuvent embaucher des travailleurs etrangers temporaires au salaire prealablement propose aux travailleurs domestiques compte tenu d options exterieures plus faibles les travailleurs etrangers temporaires deploieront davantage d efforts pour le meme salaire les entreprises prefereront donc embaucher des travailleurs etrangers par ailleurs identiques plutot que des travailleurs domestiques notre modele identifie une consequence inattendue aux ptet etant donne que les consequences d une recherche d employes domestiques infructueuse sont attenuees par l embauche de travailleurs etrangers temporaires les entreprises sont incitees a diminuer les offres salariales proposees aux travailleurs locaux en exploitant les donnees propres au canada nous avons decouvert que les travailleurs etrangers temporaires travaillaient plus d heures avaient des taux d absenteisme inferieurs et etaient moins susceptibles de se faire congedier que les travailleurs domestiques conformement au concept d effort accru developpe dans notre modele en outre pour les travailleurs etrangers temporaires originaires de pays a options exterieures relativement elevees l effort sera moindre que pour ceux provenant d autres pays

natural resources curse or blessing are natural resources a curse or a blessing the empirical evidence suggests that either outcome is possible this paper surveys a variety of hypotheses and supporting evidence for why some countries benefit and others lose from the presence of natural resources these include that a resource bonanza induces appreciation of the real exchange rate deindustrialization and bad growth prospects and that these adverse effects are more severe in volatile countries with bad institutions and lack of rule of law corruption presidential democracies and underdeveloped financial systems another hypothesis is that a resource boom reinforces rent grabbing and civil conflict especially if institutions are bad induces corruption especially in nondemocratic countries and keeps in place bad policies finally resource rich developing economies seem unable to successfully convert their depleting exhaustible resources into other productive assets the survey also offers some welfare based fiscal rules for harnessing resource windfalls in developed and developing economies

prudence with respect to ambiguity under expected utility prudence is equivalent to a positive third derivative of utility and plays a crucial role in precautionary saving behaviour eeckhoudt and schlesinger 2006 proposed behavioural definitions of prudence and of higher order risk preferences the present paper proposes a similar definition for prudence with respect to ambiguity i e situations in which objective probabilities are not available implications for several ambiguity models are derived ambiguity prudence is implied by hansen and sargent s 2001 multiplier preferences empirically correlates with financial behaviour and plays a key role in prevention behaviour this article is protected by copyright all rights reserved

remittances and the dutch disease abstract using data for el salvador and bayesian techniques we develop and estimate a two sector dynamic stochastic general equilibrium model to analyze the effects of remittances on emerging market economies we find that whether altruistically motivated or otherwise an increase in remittance flows leads to a decline in labor supply and an increase in consumption demand that is biased toward non tradables the higher non tradable prices serve as incentive for an expansion of that sector culminating in reallocation of labor away from the tradable sector a phenomenon known as the dutch disease quantitative results also indicate that remittances improve the welfare of households because they smooth income flows and increase consumption and leisure levels a bvar analysis provides results that are consistent with the dynamics of the model

bounds on elasticities with optimization frictions a synthesis of micro and macro evidence on labor supply how can price elasticities be identified when agents face optimization frictions such as adjustment costs or inattention i derive bounds on structural price elasticities that are a function of the observed effect of a price change on demand the size of the price change and the degree of frictions the degree of frictions is measured by the utility losses agents tolerate to deviate from the frictionless optimum the bounds imply that frictions affect intensive margin elasticities much more than extensive margin elasticities i apply these bounds to the literature on labor supply the utility costs of ignoring the tax changes used to identify intensive margin labor supply elasticities are typically less than 1 of earnings as a result small frictions can explain the differences between micro and macro elasticities extensive and intensive margin elasticities and other disparate findings pooling estimates from existing studies i estimate a hicksian labor supply elasticity of 0 33 on the intensive margin and 0 25 on the extensive margin after accounting for frictions

the effects of mongolia s booming mining industry on its agricultural sector a test for dutch disease dutch disease occurs when currency strengthening associated with a booming sector of an economy crowds out a lagging trade dependent sector in this study a keynesian style model is specified to deduce hypotheses about how increased foreign direct investment fdi aimed at mongolia s mining sector affects its agricultural sector a key finding is that while econometric results suggest the increased fdi strengthened mongolia s currency its adverse effect on mongolia s trade sensitive agricultural sector is not sufficiently strong to cause the sector to decline although dutch disease was not detected the posited mechanism clearly is important specifically when currency strengthening is ignored the reduced form elasticity of agricultural value added with respect to fdi is 2 7 times larger than when currency strengthening is taken into account 0 103 vs 0 038 also fdi induced currency strengthening causes the keynesian multiplier y g to drop from 2 40 to 2 00 and the fdi multiplier y fdi to drop from 3 05 to 1 89

the impact of natural resources survey of recent quantitative evidence the cross country empirical evidence for the natural resource curse is ample but unfortunately fraught with econometric difficulties a recent wave of studies on measuring the impact of natural resource windfalls on the economy exploits novel datasets such as giant oil discoveries to identify effects of windfalls uses natural experiments and within country econometric analysis and estimates local impacts these studies offer more hope in the search of quantitative evidence

does inequality drive the dutch disease theory and evidence in this paper we show that the dutch disease can arise solely from inequality in the distribution of natural resource rents given two otherwise identical countries that differ only in the ownership shares of the natural resource rents the country with the less equal distribution will have less production of manufacturing goods and less development of learning by doing in this sector as opposed to conventional models where income distribution has no effect on economic outcomes an unequal distribution of the resource wealth can generate the dutch disease dynamics even in countries with an initial comparative advantage in manufacturing we also provide a range of empirical tests of our model including both difference and system gmm estimators in a dynamic panel to disentangle the effects of inequality and institutional quality we purge our inequality measure of any linear or higher order correlations with institutional quality and repeat our system and difference gmm estimations our empirical analysis supports the hypothesis that inequality indeed plays a significant role in whether being resource rich is a blessing or a curse for a country the more unequal is the distribution of natural resource rents the stronger is the disease

international evidence on tradables and nontradables inflation abstract using 1970 1985 sectoral data for the oecd we find that inflation in nontradable goods exceeds inflation in tradables we identify a demand shift towards nontradables and faster growth of total factor productivity in the tradable goods sector as the prime causes of the differential inflation in addition disinflation attempts and the exchange rate regime appear to have exerted significant influence on the relative inflation rate

natural resources decentralization and risk sharing can resource booms unify nations previous studies imply that a positive regional fiscal shock such as a resource boom strengthens the desire for separation in this paper we present a new and opposite perspective we construct a model of endogenous fiscal decentralization that builds on two key notions a trade off between risk sharing and heterogeneity and a positive association between resource booms and risk the model shows that a resource windfall causes the nation to centralize as a mechanism to either share risk and or prevent local capture depending on the relative bargaining power of the central and regional governments we provide cross country empirical evidence for the main hypotheses finding that resource booms i decrease the level of fiscal decentralization with no u shaped patterns ii cause the former due to risk sharing incentives primarily when regional governments are relatively strong and iii have no effect on political decentralization

labor supply and the extensive margin forty years ago the french and british used to work more than the americans they now work less the aim of this paper is to provide a coher ent picture of these changes to do so we split the overall level of work activity into the number of individuals in work and the intensity of work supplied by those in work this reflects the dis tinction between whether to work and how much to work at the individual level this is referred to respectively as the extensive and intensive mar gin of labor supply the difference between the extensive and intensive margins has been highlighted in recent research attempting to resolve differ

on the intergenerational allocation of natural resources it is known hartwick and others that under standard assumptions a society that invests in reproducible capital the competitive rents on its current extraction of exhaustible resources will enjoy a consumption stream constant in time it is shown here that this result can be interpreted as saying that an appropriately defined stock of capital including the initial endowment of resources is being maintained intact and that consumption can be interpreted as the interest on that patrimony this seems like a useful rule of thumb for policy

migration flows in commodity cycles assessing the role of migration policies this paper sheds light on the role of immigration policies in shaping immigration flows in responses to labor market changes using data from australia during the 2001 to 2015 commodity cycle as a quasi experiment we find that employer sponsored demand driven immigration varied in line with commodity prices with commodity intensive states witnessing stronger growth rates than remaining states over the resources boom period there is no evidence of any such patterns for points based supply driven immigrants moreover we do not find either employer sponsored or point based migration flows increase in non tradable sector in relative to tradable sector in the triple differences analysis with state industry level data these findings emphasize the importance of employer sponsored immigration in alleviating short term local labor shortages c 2020 elsevier b v all rights reserved

environmental and resource economics a canadian retrospective the paper reviews research contributions to environmental and resource economics by scholars in canada we focus mainly on work from the past 25 years but also highlight earlier pathbreaking work we begin by looking at broad trends in research both internationally and within canada we then review canadian contributions to various topics in the field canadians have played a leading role in the development of the field especially in resource economics international environmental economics and the valuation of environmental amenities

the dutch disease a disease after all many third world oil producers are encountering serious problems in building up a diversified export base while west european oil and gas producers netherlands united kingdom are suffering a decline in their traded goods manufacturing sector induced by real wage pressures it is becoming increasingly clear that high but temporary oil revenues may be somewhat ora mixed blessing the quip of the economist notwithstanding the mechanism behind this unbalance is clear enough part of the oil revenues is spent on non traded goods which leads to a real appreciation i e a rise in the relative price of non traded goods in terms of traded goods this in turn draws resources out of the non oil traded sector into the non traded goods producing sector corden and neary 1982 van wijnbergen 1980 one may say that this is an efficient response to the increase in income from oil production the united kingdom mexico egypt simply should move into oil derived industries and non traded goods and forget about their manufacturing sector until oil reserves are exhausted however many developing countries are hesitant to take this advice after all the post world war ii success stories in economic development involve without exception countries that promoted their traded goods sector aggressively moreover it is a well established stylised fact that technological progress is faster in the traded non sheltered sectors of an economy than in the non traded sector balassa 1964 is an early reference considering the hypothesis that technological progress rather than taking place exogenously with the passage of time is a function of accumulated experience the concern of countries like egypt mexico or indonesia is much easier to understand since solow 1957 and denison 1962 it is known that capital accumulation explain only a small part of economic growth if most of economic growth is caused by learning by doing induced technologica

labor supply and taxes a survey i survey the male and female labor supply literatures focusing on implications for effects of wages and taxes for males i describe and contrast results from three basic types of model static models especially those that account for nonlinear taxes life cycle models with savings and life cycle models with both savings and human capital for women more important distinctions are whether models include fixed costs of work and whether they treat demographics like fertility and marriage and human capital as exogenous or endogenous the literature is characterized by considerable controversy over the responsiveness of labor supply to changes in wages and taxes at least for males it is fair to say that most economists believe labor supply elasticities are small but a sizeable minority of studies that i examine obtain large values hence there is no clear consensus on this point in fact a simple average of hicks elasticities across all the studies i examine is 0 30 several simulation studies have shown that such a value is large enough to generate large welfare costs of income taxation for males i conclude that two factors drive many of the differences in results across studies one factor is use of direct vs ratio wage measures with studies that use the former tending to find larger elasticties another factor is the failure of most studies to account for human capital returns to work experience i argue that this may lead to downward bias in elasticity estimates in a model that includes human capital i show how even modest elasticities as conventionally measured can be consistent with large welfare costs of taxation

model misspecification and underdiversification in this paper we study intertemporal portfolio choice when an investor accounts explicitly for model misspecification we develop a framework that allows for ambiguity about not just the joint distribution of returns for all stocks in the portfolio but also for different levels of ambiguity for the marginal distribution of returns for any subset of these stocks we find that when the overall ambiguity about the joint distribution of returns is high then small differences in ambiguity for the marginal return distribution will result in a portfolio that is significantly underdiversified relative to the standard mean variance portfolio

democracy and foreign education despite the large amount of private and public resources spent on foreign edu cation there is no systematic evidence that foreign educated individuals foster democracy in their home countries using a unique panel dataset on foreign stu dents starting in the 1950s i show that foreign educated individuals promote democracy in their home country but only if the foreign education is acquired in democratic countries the results are robust to several estimation techniques to different definitions of democracy and to the inclusion of a variety of control variables including democracy in trading partners neighboring countries level of income and level and stock of education jel d72 121 015 do foreign educated individuals play a role in fostering democracy in their home countries despite the large amount of resources spent on financing foreign education there is no systematic study on the effects of foreign education on democracy this paper fills this gap using a dataset on foreign students that includes almost all host and sending countries and spans over 50 years numerous policy initiatives and large investment in the united states are based on the notion that foreign educated students promote democracy in their countries of origin through the fulbright program the us government has financed more than 158 000 foreigners studying in the united states 1 the us government not only finances the education of foreign students but also annually issues more than 250 000 nonimmigrant visas for foreign students more than five million individuals have received visas to study in the united states since 1971 2 us efforts to educate foreign students have produced impressive results 46 current and 165 former heads of governments are products of us higher education foreign leaders educated in the united

natural resources education and economic development economic growth since 1965 has varied inversely with the share of natural capital in national wealth across countries four main channels of transmission from abundant natural resources to stunted economic development are discussed a the dutch disease b rent seeking c overconfidence and d neglect of education public expenditure on education relative to national income expected years of schooling for girls and gross secondary school enrolment are all shown to be inversely related to the share of natural capital in national wealth across countries natural capital appears to crowd out human capital thereby slowing down the pace of economic development

the narrow moving band the dutch disease and the competitive consequences of mrs thatcher notes on trade in the presence of dynamic scale economies abstract this paper presents a model of trade in which comparative advantage instead of being determined by underlying attributes of countries evolves over time through learning by doing in this model arbitrary patterns of specialization once established tend to become entrenched over time the model sheds light on three widely held views that do not make sense in more conventional models first is the view that temporary protection of selected sectors can permanently alter the pattern of comparative advantage in the protecting country s favor second is the view that seemingly favorable developments such as the discovery of exportable natural resources may lead to a permanent loss of other sectors and reduce welfare in the long run third is the possibility that a temporary overvaluation of a currency due to tight money can lead to a permanent loss of competitiveness in some sectors

commodity currencies and the real exchange rate abstract this paper examines whether the real exchange rates of commodity exporting countries and the real prices of their commodity exports move together over time using international monetary fund imf data on the world prices of 44 commodities and national commodity export shares we construct new monthly indices of national commodity export prices for 58 commodity exporting countries over 1980 2002 evidence of a long run relationship between national real exchange rate and real commodity prices is found for about one third of the commodity exporting countries the long run real exchange rate of these commodity currencies is not constant as would be implied by purchasing power parity based models but is time varying being dependent on movements in the real price of commodity exports

booming sector and de industrialisation in a small open economy this paper presents a theoretical analysis of the dutch disease the phenomenon whereby a boom in one traded goods sector squeezes porfitability in other traded goods sectors both by directly bi

labor market impacts of u s tight oil development the case of the bakken abstract there has been a recent boom in natural gas and oil production in the us due to high energy prices and technological advances in hydraulic fracturing and horizontal drilling while north dakota oil production has increased significantly since 2005 with the development of bakken formation the impact on the rest of the economy including agriculture historically the largest industry in north dakota has received little attention we employ a variant of the corden neary resource development model to test the impact of the oil boom in north dakota caused by technical change on employment and wages in two tradable sectors of the state economy agriculture and energy alongside the rest of the state s economy using a vector error correction vec model marking the very first use of the dynamic vector autoregression var analysis in this theoretical framework it was determined that the oil boom as represented by the number of rigs in the state led to an increase in employment and wages in energy sector as expected but also in the rest of the economy oil development activity had no significant impact on agricultural wages both energy sector equations employment and wage suggest relative independence of these variables from the movements in agriculture and the rest of the economy and being impacted mostly by the changes in energy sector itself seasonality does not play significant role in energy sector employment and wages unlike in agriculture and the rest of the economy

utility over time the homothetic case the purpose of this paper is to show how the economics of choice over time can be strengthened by introduction of restrictive assumptions namely additivity and homotheticity of utility we consider applications to labor supply 2 savings behavior and long run distribution and welfare measurement labor supply is mainly a function of the ratio of non labor income to the wage rate savings generally increase with increases in the rate of interest in the long run distribution is not much dependent upon initial wealth and instead is mainly determined by attitudes towards time in the long run the as if social utility function is often well measured by consumer surplus the applications appear to be strong therefore it is appropriate to begin with a general argument for the main assumptions to be imposed two early contributions to the economics of time are by becker 1 and koopmans 111 the former presents a general framework without any specific assumptions about utility over time at most there is a homogeneous technology to produce consumption from goods and time pollak and wachter 131 koopmans 1 l adds highly intuitive assumptions to show utility additive and discounted over time koopmans analysis could be extended to cases where utility is additive merely between remote time periods see rader 15 pp 161 1851 this would correspond to the realistic case where the influence of distant consumption on preferences is negligible additivity must be reinterpreted in terms of a shifting environment of current consumption plus consumption sufficiently contiguous in time the analysis following could be adapted to this most compelling case merely adding utility over time does have implications for demand for example if complementaries occur between two goods they must occur between many others e g 15 pp 228 2331 however the results are meager and insufficient for the kind of analysis economists generally want to apply therefore we are led to add the assumption of homotheticity namely 219 0022 0531 81 050219 18 02 00 o

higher order risk attitudes a review of experimental evidence abstract this paper reviews the recent but fast growing experimental literature on higher order risk attitudes after introducing the theoretical context we first review the basic evidence and empirical moderators of these risk attitudes we then discuss recent extensions to ambiguity time risk and multi attribute utility in the last part we review indirect evidence from applied economic decision tasks

survival with ambiguity we analyze a market populated by expected utility maximizers and smooth ambiguity averse consumers we study conditions under which ambiguity averse consumers survive and affect prices in the limit if ambiguity vanishes with time or if the economy exhibits no aggregate risk ambiguity averse consumers survive but have no long run impact on prices in both scenarios ambiguity averse consumers are fully insured against ambiguity in equilibrium and thus behave as expected utility maximizers with correct beliefs if ambiguity averse consumers are not fully insured against ambiguity their behavior mimics expected utility maximizers with wrong beliefs and a stochastic discount factor which might be consistently higher or lower than their actual discount factor we use this insight to analyze a markov economy with large persistent ambiguity consumers with decreasing absolute ambiguity aversion whose prudence with respect to ambiguity exceeds twice their absolute ambiguity aversion a s survive in the presence of expected utility maximizers with correct beliefs if the economy further exhibits aggregate risk they drive the expected utility maximizers out of the market and determine prices in the limit in contrast consumers with increasing or constant absolute ambiguity aversion only survive in the absence of aggregate risk and have no impact on limit prices

learning by doing and the dutch disease this paper develops a model of learning by doing and the dutch disease that extends the earlier literature in two ways first it is assumed that both the traded and the non traded sector can contribute to learning second it is assumed that there are learning spillovers between the sectors it is shown that within such a model a foreign exchange gift results in a real exchange rate depreciation in the long run due to a shift in the steady state relative productivity between the traded and the non traded sector in contrast to standard models of the dutch disease production and productivity in both sectors may go up or down the conditions for the different cases are worked out

dutch disease and the mitigation effect of migration evidence from canadian provinces this article evaluates whether immigration can mitigate the dutch disease effects associated with booms in natural resource sectors we derive predicted changes in the size of the non tradable sector from a small general equilibrium model a la obstfeld rogoff using data for canadian provinces we find evidence that aggregate immigration mitigates the increase in the size of the non tradable sector in booming regions the mitigation effect is due mostly to interprovincial migration and temporary foreign workers there is no evidence of such an effect for permanent international immigration interprovincial migration also results in a spreading effect of dutch disease from booming to non booming provinces

efficiency and the role of default when security markets are incomplete this paper argues that default plays an important positive role in the economy if markets are incomplete and traders are only able to enter into contracts that they will be able to execute regardless of future events contingent contracting may be severely restricted moreover opening new markets may not relieve these restrictions default promotes efficiency in a way that opening new markets does not by making it possible for traders to enter into contracts that they will be able to execute with high probability but not with certainty copyright 1993 by american economic association

oil price shocks sectoral and dynamic adjustments in a small open developed and oil exporting economy the recent uptrend in oil prices represents both an opportunity and a challenge for small open developed and oil exporting countries using canada as a study case and in contrast to most studies that use aggregate models this paper employs a multi sector intertemporal general equilibrium model to provide perspectives on the sectoral aggregate and dynamic adjustments of a sustained increase in oil prices it highlights the transmission channels through which the rise in oil prices affects the domestic economy the simulation results suggest that the shock would have positive aggregate impacts but would also spur the reallocation of resources and would therefore induce disparities in sectoral adjustments the suggested contraction in some industries could not however be attributed to a pure dutch disease phenomenon because of among other factors the cost push effect induced by the increase in oil prices

dutch disease dynamics reconsidered abstract in this paper we develop the first model to incorporate the dynamic productivity consequences of both the spending effect and the resource movement effect of oil abundance we show that doing so dramatically alters the conclusions drawn from earlier models of learning by doing lbd and the dutch disease in particular the resource movement effect suggests that the growth effects of natural resources are likely to be positive turning previous growth results in the literature relying on the spending effect on their head we motivate the relevance of our approach by the example of a major oil producer norway empirically we find that the effects of an increase in the price of oil may resemble results found in the earlier dutch disease literature while the effects of increased oil activity increases productivity in most industries therefore models that only focus on windfall gains due to increased spending potential from higher oil prices would conclude incorrectly based on our analysis that the resource sector cannot be an engine of growth

the purchasing power parity debate originally propounded by the 16th century scholars of the university of salamanca the concept of purchasing power parity ppp was revived in the interwar period in the context of the debate concerning the appropriate level at which to re establish international exchange rate parities broadly accepted as a long run equilibrium condition in the post war period it first was advocated as a short run equilibrium by many international economists in the first few years following the breakdown of the bretton woods system in the early 1970s and then increasingly came under attack on both theoretical and empirical grounds from the late 1970s to the mid 1990s accordingly over the last three decades a large literature has built up that examines how much the data deviated from theory and the fruits of this research have provided a deeper understanding of how well ppp applies in both the short run and the long run since the mid 1990s larger datasets and nonlinear econometric methods in particular have improved estimation as deviations narrowed between real exchange rates and ppp so did the gap narrow between theory and data and some degree of confidence in long run ppp began to emerge again in this respect the idea of long run ppp now enjoys perhaps its strongest support in more than 30 years a distinct reversion in economic thought

examining dutch disease across australian regions the recent mining boom represents one of the largest external shocks to the australian economy in its post war history although most agree that it had a positive effect on the australian economy as well as on people s living standards there is disagreement over the extent to which this boom has caused deindustrialisation and the so called dutch disease in australia our empirical findings support the presence of dutch disease nationally for australia using data for the period 1984 2013 regionally the results show that dutch disease was concentrated mainly in the eastern and southern states of australia victoria queensland south australia and tasmania

subjective beliefs and ex ante trade we study a definition of subjective beliefs applicable to preferences that allow for the perception of ambiguity and provide a characterization of such beliefs in terms of market behavior using this definition we derive necessary and sufficient conditions for the efficiency of ex ante trade and show that these conditions follow from the fundamental welfare theorems when aggregate uncertainty is absent our results show that full insurance is efficient if and only if agents share some common subjective beliefs our results hold for a general class of convex preferences which contains many functional forms used in applications involving ambiguity and ambiguity aversion we show how our results can be articulated in the language of these functional forms confirming results existing in the literature generating new results and providing a useful tool for applications

consumption dynamics in general equilibrium a characterisation when markets are incomplete we introduce a methodology for analysing infinite horizon economies with two agents one good and incomplete markets we provide an example in which an agent s equilibrium consumption is zero eventually with probability one even if she has correct beliefs and is marginally more patient we then prove the following general result if markets are effectively incomplete forever then on any equilibrium path on which some agent s consumption is bounded away from zero eventually the other agent s consumption is zero eventually so either some agent vanishes in that she consumes zero eventually or the consumption of both agents is arbitrarily close to zero infinitely often later we show that a for most economies in which individual endowments are finite state time homogeneous markov processes the consumption of an agent who has a uniformly positive endowment cannot converge to zero and b the possibility that an agent vanishes is a robust outcome since for a wide class of economies with incomplete markets there are equilibria in which an agent s consumption is zero eventually with probability one even though she has correct beliefs as in the example in sharp contrast to the results in the case studied by sandroni 2000 29 and blume and easley 2006 8 where markets are complete our results show that when markets are incomplete not only can the more patient agent or the one with more accurate beliefs be eliminated but there are situations in which neither agent is eliminated c 2010 elsevier inc all

ambiguity aversion in the long run to disagree we must also agree abstract we consider an economy populated by smooth ambiguity averse agents with complete markets of securities contingent to economic scenarios where bankruptcy is permitted but there is a penalty for it we show that if agents posterior belief reductions given by their average probabilistic beliefs do not become homogeneous then an equilibrium does not exist it is worth noting that our main result does not imply any convergence of ambiguity perception or even the attitudes towards it in this way complete markets with default and punishment allow for ambiguity aversion in the long run and the agents can disagree on their ambiguity perception but they must agree on their expected beliefs

real exchanges rates in commodity producing countries a reappraisal commodity price booms as those recorded in the last decade may have a significant economic impact in small commodity exporting developing countries whether the impact on output is positive or negative is still unclear it depends on various factors notably on the impact that commodity prices can have on the real exchange rate of the commodity exporting countries two recent papers show that the real exchange rate appreciates when commodity prices increase our analysis produces new estimates of this relationship by focusing on a large sample of developing countries which are specialized in the export of one leading commodity by using non stationary panel techniques robust to cross sectional dependence we find that the price of the dominant commodity has a significant long run impact on the real exchange rate when the exports of the leading commodity have a share of at least 20 percent in the country s total exports of merchandises our results also show that the larger this share the larger the size of the impact

redistributive taxation and personal bankruptcy in u s states abstract personal bankruptcy regulation and redistributive taxes and transfers vary considerably across u s states and over time our hypothesis is that both policies are imperfect substitutes in insuring consumption of risk averse agents in incomplete markets exploiting data variation over time for 18 u s states for the period 1980 2003 we find considerable support for this hypothesis redistributive taxation and bankruptcy exemptions are negatively correlated and both policies are associated with more equal consumption growth

boom goes the price giant resource discoveries and real exchange rate appreciation we estimate the effect of giant oil and gas discoveries on bilateral real exchange rates the size and plausibly exogenous timing of such discoveries make them ideal for identifying the effects of an anticipated resource boom on prices we find that a giant discovery with the value of a country s gdp increases the real exchange rate by 14 within 10 years following the discovery the appreciation is nearly exclusively driven by an appreciation of the prices of non tradable goods we show that these empirical results are qualitatively and quantitatively in line with a calibrated model with forward looking behaviour and dutch disease dynamics

precautionary saving in the small and in the large the theory of precautionary saving is shown to be isomorphic to the arrow pratt theory of risk aversion making possible the application of a large body of knowledge about risk aversion to precautionary saving and more generally to the theory of optimal choice under risk in particular a measure of the strength of the precautionary saving motive analogous to the arrow pratt measure of risk aversion is used to establish a number of new propositions about precautionary saving and to give a new interpretation of the dreze modigliani substitution effect copyright 1990 by the econometric society