fiscal policy and growth in a small open economy with elastic labour supply endogenizing labour supply leads to fundamental changes in the equilibrium structure of the ak growth model of a small open economy the balanced growth equilibrium is described by two tradeoff loci relating the equilibrium growth rate to the fraction of time devoted to leisure the implications of endogenous labour supply for fiscal policy are addressed the effects of distortionary taxes and government expenditure on the equilibrium growth leisure employment tradeoff are analysed the responses contrast with both those of a closed economy having an elastic labour supply and an open economy with fixed labour supply optimal fiscal policy is also characterized jel classification f41 f43 politique fiscale et croissance dans une petite economie ouverte quand l offre de travail est elastique l endogeneisation de l offre de travail entraine des changements fondamentaux dans la structure d equilibre du modele de croissance du type ak d une petite economie ouverte l equilibre de croissance balancee est decrit par deux lieux de relations d equivalence reliant le taux de croissance d equilibre a la fraction du temps allouee au loisir on examine les implications de cette endogen6isation de l offre de travail pour la politique fiscale on analyse les effets de taxes distorsionnantes et des depenses gouvemementales sur la relation d 6equivalence entre taux de croissance et loisir et donc emploi on obtient des reactions differentes de celles qu on obtient en economie ferm6e quand l offre de travail est elastique et en economie ouverte quand l offre de travail est fixe on proc ede alors a la definition de la politique fiscale optimale

non concavity problems in the dynamic macroeconomic models a note abstract this note provides a method to convert the dynamic models in cysne cysne rubens p 2006 a note on the non convexity problem in some shopping time and human capital models journal of banking and finance 30 10 2737 2745 and in cysne cysne rubens p 2008 a note on inflation and welfare journal of banking and finance 32 9 1984 1987 to concave optimization problems we do this by introducing new control and state variables in the models cysne 2006 2008 restrict attention to continuous time models and derive parametric conditions to use arrow s sufficiency theorem when the sufficient conditions presented in cysne 2006 are satisfied but not under the sharper sufficient conditions presented in cysne 2008 we can rewrite these models as concave optimization problems even if time is discrete

a two sector model of endogenous growth with leisure externalities abstract this paper considers the impact of leisure preference and leisure externalities on growth and labor supply in a lucas 1988 12 type model as in gomez 2008 7 with a separable non homothetic utility and the assumption that physical and human capital are both necessary inputs in both the goods and the education sectors in spite of the non concavities due to the leisure externality the balanced growth path is always unique which guarantees global stability for comparative static exercises we find that small differences in preferences toward leisure or in leisure externalities can generate substantial differences in hours worked and growth which may play a significant role in explaining differences in growth paths between the us and europe in addition to the mechanisms uncovered in prescott 2004 15 relying on differing marginal tax rates on labor income our model indicates however that a higher preference for leisure or leisure externality implies less growth but also less education attainment which seems counterfactual

uniqueness and indeterminacy on the dynamics of endogenous growth abstract in this paper we study the dynamics of endogenous growth both in the model of lucas and in a generalization that incorporates a labor leisure choice we characterize the regions of the parameter space that give rise to unique equilibria as well as the regions that yield a continuum of equilibria with positive growth rates we find that such multiple equilibria exist for empirically very plausible parameters in particular when the lucas model is modified to incorporate endogenous labor journal of economic literature numbers e00 e3 o40

stability global dynamics and markov equilibrium in models of endogenous economic growth abstract this paper studies the local and global dynamics of two sector models of endogenous growth with economy wide external effects and taxes on capital and labor the local analysis classifies the parameter space depending on the number of stationary solutions and local stability of equilibria the global analysis shows that if taxes are within certain bounds and the size of the external effects on the average level of human capital is smaller than the share of physical capital the equilibrium path is monotone and therefore a continuous markov equilibrium can be constructed

individual firm and market dynamics of csr activities this paper investigates how firms should plan corporate social responsibility short csr this dynamic analysis starts with a firm s intertemporal optimization problem and proceeds to analyze interactions with other firms which are crucial if csr is profitable for firm a then it is most likely also profitable for competitors b and c and these simultaneous decisions affect the gain each would achieve from trying to advance its own position we find that multiple equilibria exist irrespective of whether interactions with other firms are taken into account interactions can eliminate or create additional steady states and can lead to a situation in which history is insufficient to determine the long run outcome among multiple steady states so that coordination is beneficial

indeterminacy and sunspots with constant returns recently there has been a renewed interest in the possibility of indeterminacy and sunspots or alternatively put in the existence of a continuum of equilibria that arises in dynamic economies with some market imperfections much of the research in this area has been concerned with the empirical plausibility of indeterminacy in markets with external effects or with monopolistic competition and which exhibit some degree of increasing returns while the early results on indeterminacy relied on relatively large increasing returns and high markups more recently benhabib and farmer 1996a showed that indeterminacy can also occur in two sector models with small sector specific external effects and very mild increasing returns

poverty traps indeterminacy and the wealth distribution we consider a one sector growth model in continuous time with a production externality and endogenous labor supply there is a continuum of households who have identical preferences but differ with respect to their initial wealth we show that there exist economies such that an indeterminate steady state exists for some wealth distribution but not for others a second result is that a redistribution of wealth may drive the economy from a steady state with strictly positive output to a poverty trap in which output converges asymptotically to zero these results indicate that differences in the wealth distribution may be responsible for drastic differences in the long run standard of living journal of economic literature classification numbers d31 d50 o41

growth effect of taxes in an endogenous growth model to what extent do taxes affect economic growth abstract this paper presents an endogenous growth model comprising of financial human and physical capital and incorporating major features of a general tax system technology and preference parameter values in the model are chosen to fit the actual growth experiences of the united states and a rapidly growing east asian nic using the calibrated model i assess the role of differences in taxes and other variables in explaining the difference in growth rates the main findings are i the difference in tax systems across countries explains a significant proportion around 30 of the difference in growth rates ii the difference in preferences explains at most 4 and iii differences in labor income tax debt equity ratio and inflation can be important in explaining the growth difference further i evaluate the contribution of the monetary factor to the growth rate gap and the growth effect of us tax reforms e g revenue neutral changes in relative tax structure

indeterminacy under constant returns to scale in multisector economies recently there has been a renewed interest in indeterminacy or alternatively put in the existence of a continuum of equilibria in dynamic economies that exhibit some market imperfections one of the primary concerns of this literature has been the empirical plausibility of indeterminacy which arises in markets with external effects or with monopolistic competition often coupled with some degree 10 of increasing returns

optimal factor tax incidence in two sector human capital based models abstract this paper studies the optimal factor tax incidence in a standard two sector human capital based endogenous growth model elucidated by lucas 1988 capital income taxes generate dynamic inefficiency for capital accumulation and labor income taxes create dynamic inefficiency for human capital accumulation a factor tax incidence is a tradeoff between these two inefficiencies a switch from capital income taxes to labor income taxes reduces the long run welfare coming from lower leisure and increases the long run welfare originated from higher economic growth and higher consumption because the representative agent s learning time and human capital are inseparable and thus affect learning activities at the same degree we find that based on the current us income tax code it is optimal to first tax capital income and to resort to taxing labor income only when tax revenue is insufficient to cover government expenditure

the environmental kuznets curve and equilibrium indeterminacy abstract we illustrate that the existence of the environmental kuznets curve ekc could be the result of indeterminacy of equilibria in a simple neoclassical growth model with a single environmental externality in households utility function and with public abatement we characterize the condition on the parameters in preferences and in the pollution technology leading to local indeterminacy of equilibrium estimates of the crucial parameters of the model using data from economies that display the ekc satisfy the theoretical indeterminacy condition we find that the presence of abatement activities is not a necessary condition for indeterminacy equilibria and hence an ekc to arise on the other hand non separability of consumption and pollution in the utility function is crucial

fiscal policy elastic labor supply and endogenous growth abstract endogenizing labor supply leads to fundamental changes in the equilibrium structure of the ak growth model the balanced growth equilibrium can be described in terms of two tradeoff loci relating the equilibrium growth rate to the fraction of time devoted to leisure the implications of endogenous labor supply for fiscal policy are analyzed three issues are addressed first the effects of various distortionary tax changes and government expenditure changes on the equilibrium growth leisure employment tradeoff are analyzed second optimal fiscal policy is characterized finally the formal analysis is supplemented by numerical results focusing particularly on the quantitative welfare implications

on the dynamics of growth and fiscal policy with redistributive transfers abstract this paper continues the study of optimal fiscal policy in a growing economy by studying the case in which the government simultaneously provides three main categories of expenditures public production services public consumption services and state contingent redistributive transfers we make two contributions to the literature firstly we set up a dynamic general equilibrium model of endogenous growth in which rational voters choose the capital tax rate and the allocation of total tax revenues between productive government expenditures public production services and non productive ones public consumption services and redistributive transfers we study the properties of these policies and their impact on growth secondly we deliver analytic results for the long run and transitional dynamics of optimal fiscal policies and endogenous growth in particular we establish existence and investigate the possibility of uniqueness and dynamic determinacy and how this possibility is affected by the chosen allocative and redistributive policies

insurance induced moral hazard a dynamic model of within year medical care decision making under uncertainty health insurance may lead individuals to overconsume medical care many studies explore this moral hazard using models that aggregate medical care decisions up to the annual level using employer employee matched data from the medical expenditure panel survey meps i estimate moral hazard using a dynamic model of within year medical care consumption that allows for endogenous health transitions variation in medical care prices and individual uncertainty within a health insurance year i then estimate moral hazard under a second set of conditions that are consistent with the assumptions of most annual decision making models the within year decision making model produces a moral hazard estimate that is 19 2 larger than the alternative model i highlight the importance of controlling for within year dynamics in a model of medical care consumption using a counterfactual policy simulation that implements the individual mandate provision of the 2010 patient protection and aordable care act i nd that full implementation of the policy decreases the percentage of uninsured individuals in the population being analyzed from 11 8 to 6 0 furthermore when all uninsured individuals are forced into coverage their predicted annual medical care expenditure increases by 45 5

natural disasters in a two sector model of endogenous growth using an endogenous growth model with physical and human capital accumulation this paper considers the sustainability of economic growth when the use of a polluting input e g fossil fuels intensifies the risk of capital destruction through natural disasters we find that growth is sustainable only if the tax rate on the polluting input increases over time the long term rate of economic growth follows an inverted v shaped curve relative to the growth rate of the environmental tax and it is maximized by the least aggressive tax policy of those that asymptotically eliminate the use of polluting inputs unavailability of insurance can accelerate or decelerate the growth maximizing speed of the tax increase depending on the relative significance of the risk premium and precautionary savings effects welfare is maximized under a milder environmental tax policy especially when the pollutants accumulate gradually

two sector growth models with productive public goods equilibrium in determinacy author affiliation been lon chen institute of economics academia sinica 128 academia road section 2 taipei 11529 taiwan e mail bchen econ sinica edu tw corresponding author shun fa lee department of industrial economics tamkang university 151 ying chuan road tamsui taipei county 25137 taiwan e mail alphalee mail tku edu tw acknowledgment we are grateful to two anonymous referees and an editor for constructive comments and to participants in several workshops for valuable comments and suggestions in earlier versions of the paper 1 introductionmodels of economic growth with multiple equilibrium paths offer an explanation as to why we often observe diverse growth performances among countries with similar economic environments a central question is under what conditions is it possible to establish local indeterminacy in this paper we study a lucas 1988 human capital based growth model and investigate whether there are multiple equilibrium paths and thus local equilibrium indeterminacy in the neighborhood of a balanced growth path equilibrium indeterminacy in existing two sector human capital based growth models emerges based upon two mechanisms one of the mechanisms is differential factor tax rates initiated in the work of bond wang and yip 1996 and followed by that of raurich 2001 the other mechanism is sector specific externalities pioneered in the work of benhabib and farmer 1996 in an exogenous growth model and followed by the work of benhabib meng and nishimura 2000 and mino 2001 in endogenous growth models ben gad 2003 combined the two mechanisms these two mechanisms establish local indeterminacy when the mechanisms cause the factor intensities at the social perspective and those at the private perspective to reverse the purpose of this paper is twofold first we argue that once productive public goods are considered the two existing mechanisms are not robust in creating local indeterminacy then we take into account congestion in public services so a two sector model with the two existing mechanisms can generate local indeterminacy our purpose is motivated by the following in the existing models with sector specific externalities or distorted factor taxes there is either no government spending or if the government spending is taken into account only consumptive public spending and government transfers are considered recently a number of authors have documented the positive impact of public expenditure upon the productivity of private capital 1 when there is productive public spending the production technology is externally enhanced by the public goods productive public goods as an engine of economic growth have received much attention in endogenous growth models in particular a number of studies in this line of modeling strategy have obtained local indeterminacy 2 thus it is important to determine whether or not differential factor tax rates and sector specific externalities create local indeterminacy in models with productive public goods however as we will find the two existing mechanisms no longer create local indeterminacy in a two sector growth model with productive public goods unless the difference in the factor tax rates and the gap in the sector specific externalities are implausibly large intuitively productive public goods introduce the effects of intersectoral externalities they offset the effects of the two existing mechanisms that would have otherwise reversed the factor intensity at the social viewpoint from the factor intensity at the private viewpoint as a consequence the two existing mechanisms are not robust in the establishment of local indeterminacy in models with productive public goods this paper then introduces the congestion effect in the use of public goods an effect offsetting the effect from public spending to salvage the two existing mechanisms

critical survey endogenous growth theory a critical assessment a critical assessment is made of endogenous growth theory from the perspective of recent developments within economics as a discipline these include its increasing mathematical formalisation its focus upon microfoundations the casual use of econometrics to test models and the incorporation of factors that have traditionally been outside mainstream economics it is found that the theory focuses upon market imperfections and technological progress in a variety of ways and reconstructs their impact upon the macroeconomy as a growth rather than as a level effect whilst the growth rate is endogenised this leads to the problem of multiple equilibria and extremely complex dynamics the generalisation from exogenous growth theory is however associated with even more extreme assumptions and analytical distance from the socioeconomic processes of growth itself copyright 2000 by oxford university press

market frictions technology adoption and economic growth this paper develops an endogenous growth model with labor market matching and technology adoption while labor market search and entry frictions lengthen technology diffusion exogenous technology arrival may creatively destruct jobs in the short run such interrelationships give rise to multiple equilibria global and local indeterminacy under which a small autonomous technological improvement may create a large growth effect we characterize the effects of exogenous technology arrival on equilibrium matching adoption effort wage and the overall dispersion of wages social inefficiency arises as a result of individuals failure to account for free rider thick matching job destruction effects in making technology adoption decision

equilibrium dynamics in two sector models of endogenous growth abstract this paper considers two extensions of the uzawa lucas framework in our first extension physical capital is included as an input of the educational sector in our second extension leisure considerations are assumed to play a positive role in agents welfare the case with physical capital in the production of education features under standard conditions a unique steady state and thus the dynamics are qualitatively similar to those of the original uzawa lucas framework in our second model with leisure there could be a multiplicity of steady states with different rates of growth what determines here the chosen rate of growth is the initial relative amount of physical and human capital our results therefore illustrate that in a world without externalities there could coexist different long term growth rates

transitional dynamics of economic integration and endogenous growth abstract rivera batiz and romer have demonstrated some comparative dynamic analysis namely comparing pre and post economic integration balanced growth paths and have derived interesting economic results even though these results are interesting their analysis has a serious shortcoming namely the balanced growth path studied by them exhibits a knife edge property and is unstable this clearly implies that their results are not robust in this paper we propose a modified knowledge driven model based on their model then we give a comparative dynamic analysis and show different results of economic integration from theirs

chaos and sector specific externalities abstract benhabib and farmer 1996 indeterminacy and sector specific externalities journal of monetary economics 37 397 419 explore the possibility of local indeterminacy in a two sector model with sector specific externalities they find that very small sector specific externalities are sufficient for local indeterminacy in this case it is possible to construct sunspot equilibria where extrinsic uncertainty matters in this paper i provide a global analysis of their model revealing the existence of euler equation branching this branching allows for regime switching equilibria with cycles and chaotic behavior these equilibria occur whether the local dynamics are determinate or indeterminate

chaos sunspots and automatic stabilizers abstract we consider a real business cycle model with an externality in production depending on parameter values the model has sunspot equilibria cyclical and chaotic equilibria and equilibria with deterministic or stochastic regime switching we study the implications of this model environment for automatic stabilizer tax systems stabilization is desirable because the efficient allocations are characterized by constant employment and output growth we identify an automatic stabilizer income tax subsidy schedule with two properties i it specifies the tax rate to be an increasing function of aggregate employment and ii earnings are subsidized when aggregate employment is at its efficient level the first feature eliminates inefficient fluctuating equilibria while the second induces agents to internalize the externality

on learning to forecast in an endogenous growth model with externalities abstract this paper investigates whether learning leads to perfect foresight in a growth model that might present local indeterminacy of perfect foresight equilibria the paper asserts that under some parametric conditions on technology and preferences equilibria under the assumption of learning converge to a limit point that is different from the one corresponding to perfect foresight equilibria the paper also concludes that endogenous cycles may emerge in the economy with learning and in the economy with perfect foresight however the combination of parameters for which these fluctuations appear may differ in each economy

human capital formation and business cycle persistence abstract in this paper we examine the role of the formation of human capital in propagating shocks over the business cycle we show that a two sector equilibrium business cycle model with human capital is able to generate persistence in the growth of output and other aggregate variables comparable to that observed in the post war us data a key feature is the relatively low elasticity of substitution between skilled and unskilled labor in the production of human capital

what makes the output inflation trade off change the absence of accelerating deflation in japan it is standard to model the output inflation trade off as a linear relationship with a time invariant slope we assess empirical evidence for two sets of theories that allow for endogenous variation in the slope of the short run phillips curve at an empirical level we examine why large negative output gaps in japan in the late 1990s did not lead to accelerating deflation but instead coincided with stable albeit moderately negative inflation our results suggest that this episode is most convincingly interpreted as reflecting a gradual flattening of the phillips curve we find that this flattening is best explained by models with endogenous price durations these models imply that in any economy where trend inflation is substantially lower or substantially higher today than in past decades time variation in the slope of the phillips curve has become too important to ignore

indeterminacy and endogenous fluctuations in two sector growth models with externalities abstract this paper discusses the influence of technological externalities on the dynamic properties of accumulation paths in a two sector growth model in discrete time following the recent paper of boldrin and rustichini 1994 in which the authors study indeterminacy in a particular case we first provide some necessary and or sufficient conditions for the indeterminacy of equilibria in the general two sector model we also provide some conditions for the existence of period two cycles when equilibria are indeterminate we prove finally that depending on the nature of externality indeterminacy may lead to the existence of quasi periodic paths

budget balance welfare and the growth rate dynamic scoring of the long run government budget this paper determines conditions under which a reduction in the role of government either through a tax cut alone or together with accompanying expenditure cuts will improve long run government fiscal balance for a ceteris paribus cut in the income tax rate to improve long run government balance the intertemporal elasticity of substitution must exceed unity a tax cut balanced by an expenditure cut is likely to improve the long run balance even if it does not improve the short run balance the relationship between improving the long run fiscal balance and economic welfare is also analyzed

corrigendum to congestible public goods and local indeterminacy a two sector endogenous growth model journal of economic dynamics control 31 7 2007 2486 2518

externalities and fiscal policy in a lucas type model abstract this paper devises a fiscal policy capable of decentralizing the optimal growth path in a lucas type model when average human capital has an external effect in the goods sector and average learning time has an external effect in human capital accumulation

self fulfilling prophecies in the quality ladders economy if r d difficulty increases as it accumulates as recent evidence suggests then there is a value in the diversification of the aggregate r d efforts over the whole range of industries in the economy however this paper proves that the quality ladders models allow for self fulfilling prophecies to divert r d from an arbitrary number of sectors with potentially dramatic effects on the dynamics of industry structure and on the long run aggregate growth performance moreover in developing countries perfect markets might allow stagnant monopolies to resist despite the removal of fundamental entry barriers to dynamic competition this kind of coordination failure implies potentially strong effects of socio cultural factors on growth and suggests a positive role for public r d policy even in a framework of semi exogenous growth

taxation and growth with overlapping generations abstract this paper examines the growth effects of wage and interest income taxation in an endogenous growth model which is characterized by diminishing point in time returns in human capital producing technology and overlapping generations of two period lived individuals we show that the greater the long term learning time of individuals the more individuals inherit human capital from the previous generation we demonstrate that a flat rate wage tax stimulates economic growth while interest income taxation does not necessarily foster such growth intergenerational redistribution induces individuals to change both physical and human capital accumulation affecting the growth rate through changes in factor prices

congestible public goods and local indeterminacy a two sector endogenous growth model abstract this paper shows that the congestible public goods can generate local indeterminacy in a two sector constant return human capital enhanced growth model while the productive public good exerts positive sector specific externalities the congestion effect generates negative aggregate externalities the sector specific externalities alone arising from productive public goods cannot establish local indeterminacy without the combination of negative externality in a model with social constant return technology congestible public good generates local indeterminacy if the degree of productive public good externality and the degree of congestion effect are large enough the condition for indeterminacy is independent of the factor intensity rankings the conditions are quantitatively assessed and the required parameter values for the degrees of public good externality and congestion are consistent with the estimated values in existing literature

stages of growth in economic development abstract the paper analyses a two sector model of endogenous growth with two common features of economic development stages of sustained growth and underdevelopment traps the model also demonstrates the transitional issues of a temporary underdevelopment trap seemingly sustainable growth and a slowdown in productivity growth the temporary underdevelopment trap occurs when an economy exhibits a regime of extensive growth i e slowly declining growth in physical capital with no growth in human capital but thereafter starts a transition to sustained growth seemingly sustainable growth happens when an economy exhibits a regime of intensive growth i e both capitals grow initially but the growth of human capital subsequently ceases and the economy eventually finds itself in a zero growth trap the model also exhibits the possibility of a slowdown in productivity growth as a temporary phenomenon during the transition from the low growth stage to the high growth stage of an economy facing a new industrial revolution

stability and limit cycles in competitive equilibria subject to adjustment costs and dynamic spillovers abstract this paper derives conditions for hopf bifurcations in a general class of competitive equilibria where individual actions i lead to a dynamic spillover or an externality that is found e g in environmental economics and in the endogenous growth literature and ii these actions can be only sluggishly adjusted it turns out that only one and particularly simple to check condition allows for a hopf bifurcation in both instances of perfect foresight and myopic expectations growth of the spillover at the steady state in fact this condition ensures the existence of a bifurcation if the adjustment costs are sufficiently convex

endogenous labor supply growth and overlapping generations abstract this paper explores a simple model of endogenous growth in an overlapping generations framework when labor supply is made endogenous the following results are obtained if leisure and consumption are substitutes the economy can experience multiple equilibrium paths including high growth and high labor supply or no growth and low labor supply if the demand for leisure is inelastic then the economy enjoys steady growth as in standard models if leisure and consumption are complements then production remains bounded although endogenous growth is possible and socially desirable

impatience and equilibrium indeterminacy abstract this paper extends the neoclassical one sector optimal growth model by postulating that individual agents time preference impatience depends on the economy wide average consumption and average income which are social factors taken as external by individual agents the paper shows that with the socially determined individual time preference local equilibrium indeterminacy can arise moreover local indeterminacy can also be associated with global indeterminacy in many cases the results hold in models with bounded and unbounded growth

factor taxation and labor supply in a dynamic one sector growth model abstract this paper studies a class of ak type growth models with factor income taxes public capital stock and labor leisure trade offs while a higher capital tax rate reduces economic growth in the short run the long term growth effect is ambiguous and remains ambiguous even if the level of tax rate is larger than the degree of government externality a higher labor income tax rate has ambiguous growth effects both in the short and long runs however if the intertemporal elasticity of substitution for labor supply is sufficiently small a higher labor tax rate always lowers economic growth in the long run despite the existence of productive government taxation

indeterminacy and fiscal policies in a growing economy this paper studies the dynamic properties of a standard one sector model of endogenous growth with inelastic labor supply in which capital taxes are used to nance public production and consumption services the government is benevolent and chooses its tax policy by taking into account the decentralized competitive equilibrium within this second best setup we establish conditions for multiple balanced growth paths in conjunction with indeterminacy of transitional dynamics the mechanism for global and local indeterminacy is a simple combination of public production services that provide production externalities to private rms and hence cause a wedge between private and social returns public consumption services that provide direct utility to households and endogenously chosen distorting taxes

stability properties of a growth model abstract in existing one sector endogenous growth models a condition for indeterminacy is that labour demand is upward sloping in this paper we present conditions for indeterminacy given decreasing returns to labour

non separable utility function and indeterminacy of equilibrium in a model with human capital abstract this paper shows that non separability of utility function may produce indeterminacy of equilibrium in the representative agent models with labor leisure choice by using a two sector model of endogenous growth we show that if the utility function is not additively separable between consumption and leisure indeterminacy may emerge even in the absence of external increasing returns

financial contagion and economic development an epidemiological approach abstract we develop an epidemiological approach to analyze how financial contagion may affect and be affected by economic activity we show that according to specific parameter values the economy may converge either to a non speculative or to a speculative equilibrium in the former situation the level of per capita income is maximal while in the latter it is reduced by financial contagion the presence of economic and financial feedback effects may also give rise to macroeconomic fluctuations during the transitional path clearly showing that such economic and financial links are an important driver of the short run macroeconomic performance by extending the analysis to a spatial dimension we also show that financial contagion in some specific region may propagate quickly also in regions far away from those in which the contagion initially occurs highlighting the role of regional policy coordination to avoid interregional contagion

the impact of the massachusetts health care reform on health care use among children in 2006 massachusetts enacted a major health care reform aimed at achieving near universal coverage in the state while other studies have found that this reform substantially affected the use of health services in general the impact of the reform on children is largely unexplored children are of special interest to policymakers because it is widely believed that better health in early childhood results in large payoffs to adult health and achievement i analyze how the reform affected the insurance coverage health care utilization patterns and health outcomes of children under 18 years old

the impact of nearly universal insurance coverage on health care utilization evidence from medicare the onset of medicare eligibility at age 65 leads to sharp changes in the health insurance coverage of the u s population these changes lead to increases in the use of medical services with a pattern of gains across socioeconomic groups that varies by type of service while routine doctor visits increase more for groups that previously lacked insurance hospital admissions for relatively expensive procedures like bypass surgery and joint replacement increase more for previously insured groups that are more likely to have supplementary coverage after 65 reflecting the relative generosity of their combined insurance package under medicare