pensions with endogenous and stochastic fertility this paper studies the design of a pay as you go social security system in an overlapping generations model where fertility is in part stochastic and in part determined through capital investment if investments are publicly observable pension benefits must be linked positively to the level of investment and payroll taxes negatively to the number of children the outcome is characterized by full insurance with all parents regardless of their number of children enjoying identical consumption levels without observability benefits must increase and payroll taxes decrease with the number of children the second best level of investment and the resulting average fertility rate are less than their corresponding first best levels

testing for asymmetric information in insurance markets the first goal of this paper is to provide a simple and general test of the presence of asymmetric information in contractual relationships within a competitive context we also argue that insurance data are particularly well suited to such empirical investigations to illustrate this claim we use data on contracts and accidents to investigate the extent of asymmetric information in the french market for automobile insurance using various parametric and nonparametric methods we find no evidence for the presence of asymmetric information in this market

the effect of life expectancy on fertility saving schooling and economic growth theory and evidence we construct a simple growth model where agents with uncertain survival choose schooling time life cycle consumption and the number of children we show that rising longevity reduces fertility but raises saving schooling time and the growth rate at a diminishing rate cross section analyses using data from 76 countries support these propositions life expectancy has a significant positive effect on the saving rate secondary school enrollment and growth but a significant negative effect on fertility through sensitivity analyses the effect on the saving rate is inconclusive while the effects on the other variables are robust and consistent these estimated effects are decreasing in life expectancy

endogenous lifetime and economic growth abstract endogenous mortality is introduced in a two period overlapping generations model probability of surviving from the first period to the next depends upon health capital that is augmented through public investment high mortality societies do not grow fast since shorter lifespans discourage savings development traps are possible productivity differences across nations result in persistent differences in capital output ratios and relatively larger gaps in income and mortality high mortality also reduces returns on education where risks are undiversifiable when human capital drives economic growth countries differing in health capital do not converge to similar living standards threshold effects may also result

optimal social security in a dynastic model with investment externalities and endogenous fertility this paper studies optimal pay as you go social security with investment externalities positive bequests and endogenous fertility with an investment externality a competitive solution without social security suffers from under investment in capital and over reproduction of population we show the existence of time consistent optimal social security that improves welfare by reducing fertility and increasing capital intensity we also illustrate numerically that a small degree of this externality can justify the observed high ratios of social security spending to gdp

health education and life cycle savings in the development process this paper studies investment in health and human capital in a life cycle model health investment enhances survival to old age by improving health from its endowed level the model predicts two distinctive phases of development when income is low enough the economy has no health investment and little savings leading to slow growth when income grows health investment will become positive and the saving rate will rise leading to higher life expectancy and faster growth a health subsidy can move the economy from the first phase to the next subsidies on health and human capital investments can improve welfare

health investment saving and public policy this paper develops an overlapping generations model in which agents invest in health to prolong life in both working and retirement periods it explores how unfunded social security with or without health subsidies affects life expectancy economic growth and welfare in particular by extending life at a possible cost of capital accumulation health subsidies and a pay as you go pension can improve welfare especially in the short run

public and private expenditures on health in a growth model abstract this paper introduces endogenous longevity into an otherwise standard overlapping generations model with capital in the model a young agent may increase the length of her old age by incurring investments in health such private health investments are assumed to be more productive if accompanied by complementary tax financed public health programs the presence of the public input in private longevity is shown to expose the economy to aggregate endogenous fluctuations and even chaos and such volatility is impossible in its absence the model is capable of generating dramatic reversals in life expectancy as has been observed in many countries

interrelationships between monetary instruments and agricultural commodity trade discussion the evolving relationships of macroeconomic variables which chambers terms monetary instruments necessitates two quite different types of analyses the analysis of the evolving relationship of agricultural prices and hence utilization income etc and macroeconomic variables in a post harvest context within marketing year or across a few marketing years may be termed commodity analysis the analysis of the evolving relationship of macroeconomic variables and the long run equilibrium of the agricultural sector may be termed agricultural adjustment analysis much of commodity analysis is logically directed toward the domestic and foreign demand sectors the supply side of the livestock sector is also impacted by interest rate fluctuations in the short run much of this analysis utilizes a forecasting versus projection framework this analysis identifies marketing strategies for farmers procurement strategies for processing firms and strategies for hedging

socially optimal social security and education subsidization in a dynastic model with human capital externalities fertility and endogenous growth abstract this paper considers socially optimal government policies in a dynastic family model with physical capital human capital endogenous fertility and positive spillovers from average human capital such spillovers reduce human capital investment but raise fertility from their social optimum we first characterize the social optimum with a non convex feasible set due to the quantity quality tradeoff concerning children we then show that social security and education subsidization together financed by labor income taxes can fully eliminate the efficiency losses of the spillovers and achieve the social optimum under plausible conditions however none of the policies can do so alone

the baby boom and baby bust what caused the baby boom and can it be explained within the context of the secular decline in fertility that has occurred over the last 200 years the hypothesis is that a the secular decline in fertility is due to the relentless rise in real wages that increased the opportunity cost of having children b the baby boom is explained by an atypical burst of technological progress in the household sector that occurred in the middle of the last century this lowered the cost of having children a model is developed in an attempt to account quantitatively for both the baby boom and bust

optimal choice of health and retirement in a life cycle model abstract we examine within a life cycle model the simultaneous choice of health care and retirement together with consumption health tends to have an impact on retirement through morbidity determining earnings and the disutility of work and through longevity determining the need to accumulate retirement wealth conversely the age of retirement drives the demand for health care through the value of survival and the value of morbidity reductions we characterise the optimal relationship between health expenditure and retirement and apply our model to analyse the effects of moral hazard in the annuity market while moral hazard always induces excessive health investments and an excessive duration of working life it also triggers an excessive level of consumption if the impact of health on the disutility of work is sufficiently large we examine a transfer scheme and mandatory retirement as policies towards curtailing moral hazard numerical analysis illustrates the role of moral hazard in shaping the life cycle allocation

an intergenerational model of population growth the problem of population growth has been only partially formulated in an intertemporal context therefore a link between population theory and economic growth theory is still missing this paper attempts to provide such a link by analyzing an intergenerational model of optimum population growth the model accommodates the idea that decisions on increases in population should consider the new population s quality of life this concept is elaborated upon in a static framework by gary becker and gregg lewis dennis de tray and robert willis other literature on population growth such as harold votey disregards this consideration altogether 2 more explicitly this paper assumes that the utility of each generation is a function of the level of its consumption and the number and utility of the newly born people we are thus led to consider the utility of an infinite number of generations this model differs from paul samuelson s intergenerational model of pure consumption in which the utility of each generation depends only on that generation s own consumption recently philip neher 1971 analyzed a model of fertility in primitive economies it is based on the assumption that parents use children as investments to insure future consumption needs neher s analysis focuses entirely on the pension motive for having children 3 our model assumes that fertility is determined so as to balance the parents welfare derived from additional children against that derived from the children s quality of life we first outline a general model of optimum population growth in order to discuss explicitly various economic aspects of population we use a simple case in the analysis section i sets up the basic model

social security in a non altruistic model with uncertainty and endogenous fertility abstract the effect of social security on fertility and saving is analyzed within a nonaltruistic model of intergenerational transfers both in the absence and in the presence of a perfect capital market fertility is reduced by a budget balanced increase in social security if the individuals have a high degree of risk aversion savings are unambiguously increased by an expansion of social security while the effect of a deficit financed expansion of the social security system on saving and fertility depends on the characteristics of the policy package considered

the determinants of bargaining power in an empirical model of transfers between adult children parents and in laws for south korea abstract we derive a bargaining model of transfers between adult children and their parents and then estimate the model using data from south korea our analysis extends the literature on family bargaining by i arguing that transfers from the couple represent semiprivate consumption e g it is plausible that the wife cares more about her parents than about the husband s parents and vice versa and ii using results from laboratory experiments to help identify the model we find that women have slightly more bargaining power than men in the couple s decision making we also find that when an adult child receives an extra dollar of income she transfers half of it to her parents this result is consistent with previous work finally we reject the null hypothesis that bargaining power within the family depends only on the potential wage of each spouse

social security the family and economic growth we show that a defined benefits payg social security system distorts key family based choices that affect economic growth we identify human capital as the engine of growth and the motivating forces linking the family s overlapping generations as mutually productive intergenerational transfers and or altruism the payg system is shown to affect adversely at least one of three determinants of the economy s growth path fertility savings and investment in human capital the specific effects may vary over different stages of economic development the growth rate is expected to fall in advanced economies our analysis indicates that the effect may be sizeable jel 915 111 850

social security longevity and moral hazard abstract recently several authors have argued that social security can have positive effects on savings and welfare when individuals possess hidden information about their longevity that is when there is adverse selection in annuity markets this paper considers the related problem of the effects of social security when individuals can take hidden actions to affect their longevity that is when there is moral hazard in annuity markets in contrast to the adverse selection models we show that social security never raises welfare in a pure moral hazard economy as well social security may either increase or reduce longevity depending on the characteristics of the health related goods consumed it is suggested that a complete analysis of social security needs to consider both adverse selection and moral hazard

jointly determined saving and fertility behaviour theory and estimates for germany italy uk and usa abstract the comparative statics predictions of models of the joint determination of household saving and fertility are derived under various hypotheses self interest altruism of parents towards children altruism of children towards parents etc and compared with those of models which determine saving under the assumption of exogenous fertility country specific saving and fertility equations are then estimated using time series data for germany italy uk and usa for each of the countries considered the estimates are consistent with the hypothesis that saving and fertility are jointly determined by self interested parents and reject the alternative hypotheses the data also show that a self financing expansion of social security discourages fertility and generally raises household saving

intergenerational trade longevity and economic growth we develop an overlapping generations model of endogenous growth in which human capital is the engine of growth and the generations are linked through material and emotional interdependencies within the family parents invest in their children to achieve both old age support care and emotional gratification and material support from children is determined through self enforcing implicit contracts we show that optimal intergenerational trade can then lead to maximization of growth opportunities our model produces a theory of the demographic transition linking longevity fertility and economic growth we also show that while population aging may raise the growth rate an increase in young age longevity is likely to produce a greater increase in the growth rate and a reduction in the fertility rate in a growth equilibrium these predictions and the model s implications concerning the behavior of private savings during the takeoff period appear consistent with empirical evidence

political complements in the welfare state health care and social security abstract all oecd countries target a large majority of their welfare spending to the elderly through public pensions and health care programs spending in both programs has largely increased in the past decades often more than the share of elderly in the population we suggest that these phenomena may be due to political complementarities between these two transfer programs we show that these two programs may coexist because public health care may increase the political constituency in favor of social security and vice versa specifically public health decreases the absolute longevity differential between low and high income individuals therefore rising the retirement period and the total pension benefits of the former relatively to the latter this effect increases the political support for social security among the low income young we show that in a political equilibrium of a two dimensional majoritarian election a voting majority of low income young and retirees supports a large welfare state the composition between public health and social security is determined by intermediate median income types who favor the contemporaneous existence of these two programs since public health increases their longevity enough to make social security more attractive technological improvements in health care strengthens this complementarity and lead to more welfare spending

health spending savings and fertility in a lifecycle dynastic model with longevity externalities we investigate health spending savings fertility and policy implications in a lifecycle dynastic model with longevity externalities in annuity returns we show that such externalities engender not only excessive health spending but also under saving and excessive fertility social security and health subsidization increase health spending and savings but reduce fertility from laissez faire levels a publicly funded universal health system under labour income taxation raises fertility taxing health spending or using social security and public health together can obtain socially optimal health spending savings longevity and fertility numerical results based on us observations suggest substantial variations among these cases especially in old age health spending

old age longevity and mortality contingent claims this paper analyzes the savings and longevity impacts of mortality contingent claims defined here as income measures such as annuities and life insurance under which earned income is contingent on the length of one s life the postwar increase in mandatory annuity and life insurance programs as well as the rapid increase in the life expectancy of older ages motivates a better understanding of the incentive effects that mortality contingent claims have on longevity related behavior we claim that these incentives in often alter the standard conclusions obtained about old age support when mortality is treated exogenously in particular we argue that annuities involve moral hazard effects that increase longevity and among other things introduce a positive interaction between public programs for health care and income support for the elderly programs that have grown enormously in developed countries

the impact of unemployment insurance generosity on match quality distribution abstract this paper investigates the impact of unemployment insurance ui generosity on the distribution of match tenure we show that more generous ui increases expected tenure reducing the mass of the lower tail of match duration and increasing the duration of matches available this impact is differentiated across education levels with the larger benefits accruing to the less educated

social security and endogenous growth abstract this paper examines the effects of social security on the steady state growth of per capita income in an endogenous growth model in which agents care about their own consumption the number of children and the welfare of each child it shows that an unfunded program may simulate growth by reducing fertility and increasing the ratio of human capital investment per child to per family income when bequests are positive also it may cause faster growth than funded programs especially when receipts from funded programs are independent of contributions when voluntary saving is positive funded social security is neutral if receipts are linked to contributions and most likely depresses growth if receipts are independent of contributions

the family inheritance and the intergenerational transmission of inequality unequal inheritance of material wealth is commonly considered a major cause of inequality in consumption however theoretical models of the intergenerational transmission of inequality by becker blinder and ishikawa imply that unequal inheritance may either increase or reduce consumption inequality differences in inherited wealth resulting from unequal parental incomes increase inequality in recipients consumption however unequal bequests caused by differences among families in the endowed ability of children or the costs of producing human capital are equalizing empirical results confirm these predictions the inheritance received by children is inversely related to both children s income and parental education thus bequests are compensatory in that ceteris paribus low income children inherit more than their advantaged contemporaries

fertility human capital accumulation and the pension system this paper provides a unified treatment of externalities associated with fertility and human capital accumulation within pas as you go pension systems it considers an overlapping generations model in which every generation consists of high earners and low earners with the proportion of types being determined endogenously the number of children is deterministically chosen but the children s future ability is in part stochastic in part determined by the family background and in part through education in addition to the customary externality source associated with a change in average fertility rate this setup highlights another externality source this is due to the effect of a parent s choice of number and educational attainment of his children on the proportion of high ability individuals in the steady state our other results include i investments in education of high and low ability parents must be subsidized ii direct child subsidies to one or both parent types can be negative i e they can be taxes iii net subsidies to children direct child subsidies plus education subsidies to at least one type of parents must be positive iv parents who have a higher number of children should invest less in their education

effects of exchange rate changes on u s agriculture a dynamic analysis an econometric model of the wheat corn and soybean markets is used to examine the dynamic effects of exchange rate fluctuation on u s commodity markets exports and agricultural prices are found to be sensitive to movements in the exchange rate while domestic factors such as disappearance and inventories are less sensitive but still responsive dramatic short run adjustments in prices and exports are followed by less dramatic but significant longer run adjustments thus the hypothesis of elastic response to the exchange rate seems particularly relevant for the short run

endogenous fertility and optimal population size pareto optimality which is the standard criterion of efficiency in general equilibrium models takes population size as given and therefore cannot be directly applied to analyze the question of optimal population size the criterion then for optimal population size must be based on a more restrictive definition of optimality this paper extends peter diamonds 1965 golden golden rule growth model by assuming that individuals derive utility from their own consumptionand from their own children offspring are assumed to consume resources before reaching adulthood the authors show that the optimal steady state utility yields a higher population growth rate when it converges to the golden rule allocation they then demonstrate that a voluntary social security program in which the size of the transfer to a particular agent is directly tied to his own fertility leads the competitive allocation to be identical to the allocation corresponding to the maximum of the steady state utility of the representative individual

the determinants and effects of health expenditure in developed countries previous studies of international differences in health spending have been restricted to the use of relatively small samples of cross sectional data our objective here is to re examine the results of previous work using a sample of 560 pooled time series and cross section observations results confirm the importance of gdp as a determinant of health spending with an estimated income elasticity at or around unity but also suggest that oecd countries should not be regarded as a single homogeneous group the importance of some non income variables is also confirmed although the direct effect of these factors appears to be small

intergenerational transfers and the accumulation of wealth h t ouseholds acquire wealth from two sources they save out of income they have earned and they receive transfers from other people the first method of wealth accumulation goes under the name of life cycle saving in which people save during their working lives and dissave after retirement the second involves either an inter vivos transfer that is a transfer between living people or a bequest a transfer that occurs at the death of the donor while inter vivos transfers and bequests will arise in dynastic models where preferences include a taste for the well being of one s descendents few empirical life cycle models reflect these concerns indeed a sharp debate has arisen over the ability of the simple life cycle model to explain observed wealth accumulation understanding the relative sizes of these sources of wealth accumulation affects a variety of issues for example the effects of government debt social insurance public transfer programs estate taxes and incentives for charitable giving depend to some extent on the magnitude and nature of private saving and transfers of wealth analyses of the inequality of wealth may depend on whether most of wealth is earned or received as transfers appropriate policies for encouraging private saving may look rather different depending on whether most saving is to be consumed later in life or passed along to the next generation finally evidence on transfer patterns relates to more fundamental

optimal social security in a dynastic model with human capital externalities fertility and endogenous growth abstract in this paper we investigate the optimal scale of pay as you go social security in a dynastic family model with human capital externalities fertility and endogenous growth human capital externalities reduce the return to human capital investment and hence lead to under investment in human capital and over reproduction of the population if the taste for the number of children is sufficiently weak relative to the taste for the welfare of children social security can be welfare enhancing by reducing fertility and raising human capital investment per child

bequest motives a comparison of sweden and the united states this paper reviews four well known theoretical models of private bequest behavior notes their differing implications for public policy and discusses a way of empirically dis criminating among them then it implements the test with micro data from sweden lls and the u s psid the so called altruistic or dynastic model which among the four models has perhaps the most wide ranging implications for policy receives some support the sign pattern is as the model predicts while the magnitude is much smaller than the altruistic theory implies there is evidence of a potential complication due to a dependence of children s education on parents financial status in the case of the u s 2001 elsevier science b v all rights reserved

social security intergenerational transfers and endogenous growth in this paper the effects of social security in a simple model of endogenous growth with alternative motives of having children are analyzed it shows how the effects of social security depend on the size of the social security tax the motive to have children and the pattern of intergenerational transfers the pattern of intergenerational transfers itself however is shown to change with the social security tax rate when the social security tax is not too high social security increases per capita income growth and tends to enhance welfare