human capital inequality life expectancy and economic growth this article presents a model in which inequality affects per capita income when individuals decide to invest in education taking into account their life expectancy which depends to a large extent on the human capital of their parents our results show the existence of multiple steady states depending on the initial distribution of education the low steady state is a poverty trap in which children raised in poor families have low life expectancy and work as non educated workers the empirical evidence suggests that the life expectancy mechanism explains a major part of the relationship between inequality and human capital accumulation increases in life expectancy and human capital accumulation have accelerated since the post world war ii period in most parts of the world however in spite of the convergence in life expectancy across countries during this period see for example becker et al 2005 in 2000 there was still an immense gap between the rich and the poor world life expectancy was 78 years in oecd countries but only 47 years in sub saharan africa where the gap with rich countries is increasing nowadays due to aids being widespread likewise the striking disparities in human capital are also evident whereas the secondary school enrolment rate was almost 100 in rich countries more than 70 of children in sub saharan africa were not enrolled in secondary schooling and therefore entered the labour market as unskilled workers from childhood these disparities in schooling are also accompanied by huge differences in the distribution of education thus the human capital gini coefficient in sub saharan africa 0 56 is twice as high as that of oecd countries 0 21 in this article we argue that high human capital inequality low life expectancy and low human capital accumulation rates reinforce each other and may explain the persistence of poverty in a great part of the world

occupational choice and the process of development this paper models economic development as a process of institutional transformation by focusing on the interplay between agents occupational decisions and the distribution of wealth because of capital market imperfections poor agents choose working for a wage over self employment and wealthy agents become entrepreneurs who monitor workers only with sufficient inequality however will there be employment contracts otherwise there is either subsistence or self employment thus in static equilibrium the occupational structure depends on distribution since the latter is itself endogenous we demonstrate the robustness of this result by extending the model dynamically and studying examples in which initial wealth distributions have long run effects in one case the economy develops either widespread cottage industry self employment or factory production employment contracts depending on the initial distribution in the other example it develops into prosperity or stagnation

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

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

mortality reductions educational attainment and fertility choice this paper develops a model where reductions in mortality are the main force behind economic development the model generates a pattern of changes similar to the demographic transition where gains in life expectancy at birth are followed by reductions in fertility and increases in the rate of human capital accumulation the onset of the transition is characterized by a critical level of life expectancy at birth which marks the movement of the economy from a malthusian equilibrium to an equilibrium with investments in human capital and the possibility of long run growth

a model of longevity fertility and growth abstract economic and demographic outcomes are determined jointly in a dynamic general equilibrium model of longevity fertility and growth reproductive agents in overlapping generations mature safely through two periods of life and face an endogenous probability of surviving for a third period given this probability each agent maximises her expected lifetime utility by choosing consumption and the number of children child bearing is costly in the sense that time must be spent on child rearing activities rather than on production or education the model produces multiple development regimes which yield different predictions about life expectancy fertility timing of births and educational investment depending on initial conditions these predictions accord strongly with the empirical evidence on demography and development

income distribution and macroeconomics this paper analyzes the role of wealth distribution in macroeconomics through investment in human capital it is shown that in the presence of credit markets imperfections and indivisibilities in investment in human capital the initial distribution of wealth affects aggregate output and investment both in the short and in the long run as there are multiple steady states this paper therefore provides an additional explanation for the persistent differences in per capita output across countries furthermore the paper shows that cross country differences in macroeconomic adjustment to aggregate shocks can be attributed among other factors to differences in wealth and income distribution across countries

disease and development the effect of life expectancy on economic growth we exploit the major international health improvements from the 1940s to estimate the effect of life expectancy on economic performance we construct predicted mortality using preintervention mortality rates from various diseases and dates of global interventions predicted mortality has a large impact on changes in life expectancy starting in 1940 but no effect before 1940 using predicted mortality as an instrument we find that a 1 percent increase in life expectancy leads to a 1 7 2 percent increase in population life expectancy has a much smaller effect on total gdp however consequently there is no evidence that the large increase in life expectancy raised income per capita

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

mother s education and the intergenerational transmission of human capital evidence from college openings we examine the effect of maternal education on birth outcomes using vital statistics natality data from 1970 to 1999 we also assess the importance of four channels through which maternal education may improve birth outcomes use of prenatal care smoking marriage and fertility in an effort to account for the endogeneity of education attainment we use data about the availability of colleges in the womans country in her 17th year as an instrument for maternal education we find that higher maternal education improves infant health as measured by birth weight and gestational age it also increases the probability that a new mother is married reduces parity increases use of prenatal care and reduces smoking suggesting that may be important pathways for the ultimate effect on health our results add to the growing body of literature which suggests that estimates of the returns to education which focus only on increases in wages understate the total return

human capital and economic development abstract this paper develops a general equilibrium model of fertility and human capital investment with young adult mortality because young adult mortality is negatively related to average young adult human capital human capital accumulation lowers mortality inducing demographic transition and industrial revolution data confirm that young adult mortality is related negatively to schooling and the rate of return to schooling and positively to fertility the data indicate a negative relationship between tfp growth and schooling accumulation the model fits the data on country populations per capita incomes human capital total fertility rates infant mortality life expectancy and conditional life expectancy

uncertainty and irreversibility in groundwater resource management abstract optimal exploitation of renewable groundwater resources when extraction affects the probability of occurrence of an irreversible event is studied the term irreversible signifies that the event occurrence renders the resource obsolete it is found that uncertainty concerning the event occurrence has a profound effect under certainty when the stock level below which the event occurrence has a profound effect the optimal state process converges to a unique equilibrium state under uncertainty when the event occurrence level is unknown we identify equilibrium intervals and show that optimal processes initiated elsewhere converge to a boundary of one of these intervals inside an equilibrium interval the expected loss due to the event occurrence is so high that it does not pay to extract in excess of recharge even though under certainty doing so would be beneficial

healthy bodies and thick wallets the dual relation between health and economic status there is abundant evidence of a quantitatively large association between many measures of economic status including income and wealth and a variety of health outcomes such as mortality or morbidity however considerable and often heated debate remains especially across disciplines about the direction of causation and about why the association arises although medical scientists are often convinced that the dominant if not exclusive pathway is that variation in socioeconomic status produces health disparities they are increasingly debating among themselves about why low economic status might lead to poor health at least for modern industrial countries 1 the old standby arguments the less well to do have access to less or lower quality medical care or a stronger pattern of deleterious personal behaviors have been rejected as insufficient instead a series of intriguing competing theories have arisen that emphasize long term impacts of early childhood or even inter uterine environmental factors the cumulative effects of prolonged exposures to individual stressful events or reactions to macro societal factors such as rising levels of income inequality a common link is that each theory attempts to document the physiological processes through which low economic status leads to poorer health while these scientific questions are extremely important this research has taken place with little input from economists economists are now making contributions about the alternative pathway the impact poor health may have on economic resources poor health may restrict a family s capacity to earn income or to accumulate assets by limiting work or by raising medical expenses at a minimum this work should provide a caution against exaggerating the magnitude of causation from economic status to health outcomes but the potential contribution runs deeper as people age the evolving variation in individual health outcomes may offer additional statistical information to estimate parameters of household savings and consumption behavior that so far have proven to be somewhat elusive thus incorporating health uncertainty and risk into economic models should eventually enrich our understanding of basic tenets of household behavior the first section of this paper documents the size of the association between health and one prominent economic status measure household wealth section two deals with how health influences economic status by sketching out reasons why health may alter household savings and eventually wealth and then providing estimates of the empirical magnitude of these effects section three shifts attention to the alternative pathway the links between economic status and health and summarizes 2major controversies and evidence surrounding these issues

life expectancy and endogenous growth we consider an overlapping generations model with uncertain lifetime and endogenous growth individuals have to choose the length of time devoted to schooling before starting to work we show that it depends positively on life expectancy but that the positive effect of a longer life on growth could be offset by a decrease in the participation rate dynamics are characterized by a delay differential equation and human capital converges with oscillations to a balanced growth path

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

factor shares and savings in endogenous growth in models of steady investment driven growth an individual s propensity to save depends on how much of his income is drawn from accumulated factors of production capital rather than from nonaccumulated factors when agents are heterogeneous in this respect growth oriented policies have distributional consequences and in the absence of lump sum redistribution their implementation faces political constraints if the median voter is capital poor relative to the economy s representative agent political interactions tend to slow down growth when policy acts on capital s income share and tend to accelerate it when investment subsidies are the policy instrument of choice copyright 1993 by american economic association

a theory of trickle down growth and development this paper develops a model of growth and income inequalities in the presence of imperfect capital markets and it analyses the trickle down effect of capital accumulation moral hazard with limited wealth constraints on the part of the borrowers is the source of both capital market imperfections and the emergence of persistent income inequalities three main conclusions are obtained from this model first when the rate of capital accumulation is sufficiently high the economy converges to a unique invariant wealth distribution second even though the trickle down mechanism can lead to a unique steady state distribution under laissez faire there is room for government intervention in particular redistribution of wealth from rich lenders to poor and middle class borrowers improves the production efficiency of the economy both because it brings about greater equality of opportunity and also because it accelerates the trickle down process third the process of capital accumulation initially has the effect of widening inequalities but in later stages it reduces them in other words this model can generate a kuznets curve

the dynamics of the wealth distribution and the interest rate with credit rationing are uniquely determined and wealth dispersion among individuals or firms is irrelevant introducing credit rationing into the solow model modifies these conclusions multiple stationary interest rates and wealth distributions can exist because higher initial rates can be self reinforcing through higher credit rationing and lower capital accumulation the wealth accumulation process is ergodic in every steady state but wealth mobility is lower with higher steady state interest rates aggregate output is higher in steady states with lower interest rates because credit is better allocated short run interest rate or distribution shocks can be self sustaining and can have long run effects on output through the induced dynamics of the wealth distribution and credit rationing

benefit based conjoint analysis firms develop products by manipulating the attributes of offerings and consumers derive utility from the benefits that the attributes afford while the field of marketing has long been aware of the distinction between attributes and benefits it has not developed methods for understanding how attributes and benefits are related this paper develops a benefit based model for conjoint analysis that assumes consumers satiate on attributes that are perceived to provide the same benefit a latent variable model is proposed that estimates the map between attributes and benefits and is applied to data from two conjoint studies involving a durable product and a household consumable the model is shown to fit the data better provide improved predictions and lead to different product design implications than the standard conjoint model data as supplemental material are available at http dx doi org 10 1287 mksc 2016 1003

vintage human capital demographic trends and endogenous growth we study how economic growth is affected by demographics in an overlapping generations model with a realistic survival law individuals optimally chose the dates at which they leave school to enter the labor market and at which they retire endogenous growth arises thanks to the accumulation of generation specific human capital favorable shifts in the survival probabilities always induce longer schooling and later retirement but have an ambiguous effect on growth the relationship between the growth of population and per capita growth is hump shaped increases in longevity can be responsible for a switch from a no growth regime to a sustained growth regime and for a positive relationship between fertility and growth to vanish