Was the increase in income inequality in the US due to permanent shocks or merely to anincrease in the variance of transitory shocks? The implications for consumption and welfaredepend crucially on the answer to this question. We use CEX repeated cross-section data onconsumption and income to...

This paper analyzes dynamic equilibrium risk sharing contracts between profit-maximizing intermediaries and a large pool of ex-ante identical agents that face idiosyncratic income uncertainty that makes them heterogeneous ex-post. In any given period, after having observed her income, the agent...

Does it make us unhappier when we compare our consumptionwith that of the Joneses or our own past achievements? This paper tries ananswer by bringing together two disparate literatures: the macro (growth)theory on habit formation and the applied literature related to the Easterlinparadox. Using...

We prove that for any incomplete market and any concave utilityfunction the marginal propensities to consume and to save are alwayspositive. Furthermore, we introduce a class of incomplete markets thatincludes almost all well known examples of market incompleteness infinance and macroeconomics....

In this paper, I present a theory of dynamic economic growth, business cycles, and asset pricing that integrates (1) Marx's idea (and emphasized by Klein) of a two-class heterogeneity of the ownership structure of physical capital and human capital in a capitalist society, (2) Keynes' idea of...

This paper introduces state dependent utility into the standard Mehra and Prescott (1985) economy by allowing the representative agents coefficient of relative risk aversion to vary with the underlying economys growth rate. Existence of equilibrium is proved and its asymptotic properties...

We study the eect of a declining labor force on the incentives to engage in labor-savingtechnical change and ask how this eect is inuenced by institutional characteristics of the pensionscheme. When labor is scarcer it becomes more expensive and innovation investments that increaselabor...

A pay-as-you-go (paygo) pension program may provide intergenerational pooling of risks toindividuals´ labor and capital income over the life cycle. By means of a model that providesilluminating closed form solutions, we demonstrate that the magnitude of the optimal paygoprogram and the nature...

We analyze the effect of enhanced annuities on an insurer engaging in individualunderwriting. We use a frailty model for the heterogeneity of the insured populationand model the individual underwriting by a random variable that positivelycorrelates with the corresponding frailty factor. For a...

Das Preis-Leistungs-Verhältnis herkömmlicher Rentenversicherungen steigt mitder Lebenserwartung des Versicherten. Derartige Produkte sind damit nur für Personen mit relativ hoher Lebenserwartung attraktiv. Der Nachteil für Versichertemit reduzierter Lebenserwartung wird durch steuerliche...