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Journal Article
Reforming Social Security: a welfare analysis
Working Paper
The effects of aging and myopia on the pay-as-you-go social security systems of the G7
The Social Security systems of the G7 countries were established in an era when populations were young and the number of contributors far outweighed the number of beneficiaries. Now, for each beneficiary there are fewer contributors, and this downward trend is projected to accelerate. To evaluate the prospects for these economies we develop an overlapping generations model in which growth is endogenously fueled by individuals' investments in physical and human capital and by the government's investment in human capital via public education expenditures. We analyze individuals' behavior when ...
Working Paper
Aging, myopia and the pay-as-you-go public pension systems of the G7: a bright future?
The public pension systems of the G7 countries were established in an era when the number of contributors far outweighed the number of beneficiaries. Now, for each beneficiary there are fewer contributors, and this trend is projected to accelerate. To evaluate the prospects for these economies we develop an overlapping generations model where growth is endogenously fueled by investments in physical and human capital. We analyze individuals' behavior when their expectations over their length of life are rational or myopic and examine whether policies exist that can offset the effects of aging, ...
Working Paper
The transition from a-pay-as-you-go to a fully-funded Social Security System: is there a role for social insurance?
This paper develops a model to examine the effects of introducing a fully-funded government sponsored pension plan into an overlapping generations model with an extant pay-as-you-go social security system. We examine whether individual and social welfare can be improved by phasing out the current pay-as-you-go system and replacing it with a fully-funded system in which pension benefits are at least partially annuitized. Furthermore, we consider the effects of means testing social security benefits and providing a income guarantee funded in a pay-as-you-go manner. We find that the presence of ...
Working Paper
Dependent children and aged parents: funding education and social security in an aging economy
In the last few decades in the United States birth rates have declined and longevity has risen while productivity growth has slowed. Given such changes, the increasing burden of funding programs for the elderly is likely to shift resources away from the young and toward the elderly. This paper uses an overlapping generations framework to examine the effects of tax policies on an aging economy. We find that if the quality of the education system is sufficiently high then shifting tax resources away from social security and toward education is both growth and welfare enhancing.
Working Paper
A simple model of international capital flows, exchange rate risk, and portfolio choice
This paper examines international capital flows in the context of a simple Diamond-Dybvig model in which there are neither moral hazard nor adverse selection problems, thus isolating exchange rate risk as the propagator of capital flows. The model shows that adverse changes in exchange rate expectations can result in "hot money" flows even when a bank's balance sheet is perfectly transparent and its assets have a positive net present value in local currency terms. The model also indicates that foreign deposit guarantees even in the absence of a change in the bank's portfolio can increase ...
Working Paper
The effects of annuities, bequests, and aging in an overlapping generations model of endogenous growth.
In this paper, we examine the effects of introducing actuarially fair annuity markets into an overlapping generations model of endogenous growth. We find the complete annuitization of agents' wealth is not, in general, dynamically optimal; that the degree of annuitization that is dynamically optimal depends nonmonotonically on the expected length of retirement and on the pay-as-you-go social security tax rate. We find that the government has an incentive to restrict the availability of actuarially fair annuities contracts, and that it can often move the economy from a pay-as-you-go to a ...
Working Paper
External increasing returns, short-lived agents and long-lived waste
Actions that affect environmental quality both influence and respond to macroeconomic variables. Further, many environmental and macroeconomic consequences of current actions will have uncompensated effects that outlive the actors. This paper presents an overlapping-generations model of environmental externalities and capital accumulation: consumption of the old generates long-lived garbage as a by-product, while young agents invest in both capital and destruction of the existing garbage stock. The model also assumes external increasing returns: increases in the capital stock increase the ...
Working Paper
Government mandated private pensions: a dependable foundation for retirement security?
We develop a model of an overlapping generations economy characterized by private pensions where risk averse agents face both longevity and investment risks. The government mitigates the effects of longevity risk by mandating that individuals purchase annuities. Investment risk arises since the returns on annuities deviate randomly from actuarial fairness as a result of differences in the costs of administering pension funds. Thus, identical agents' pensions may yield drastically different returns: the government's pension policy is not horizontally equitable. We examine whether policies ...