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 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...

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...

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...

I argue that progress in understanding economic development (as in other branches of economics)must come from the investigation of mechanisms; the associated empirical analysis can usefully employa wide range of experimental and non-experimental methods. I discuss three different areas of...

This paper uses mortgage data to construct a measure of terms on which households access to externalfinance, and relates it to consumption at both the aggregate and cohort levels. The Household ExternalFinance (HEF) index is based on the spread paid by risky borrowers in the mortgage market....