Creator: Golosov, Mikhail, Jones, Larry E., and Tertilt, Michèle Series: Working paper (Federal Reserve Bank of Minneapolis. Research Department) Number: 630 Abstract:
In this paper, we generalize the notion of Pareto-efficiency to make it applicable to environments with endogenous populations. Two efficiency concepts are proposed, P-efficiency and A-efficiency. The two concepts differ in how they treat people who are not born. We show how these concepts relate to the notion of Pareto-efficiency when fertility is exogenous. We then prove versions of the first welfare theorem assuming that decision making is efficient within the dynasty. Finally, we give two sets of sufficient conditions for noncooperative equilibria of family decision problems to be efficient. These include the Barro and Becker model as a special case.
Stichwort: First welfare theorem, Altruism, Dynasty, Pareto optimality, and Fertility
Creator: Kocherlakota, Narayana Rao, 1963- and Pistaferri, Luigi Series: Staff report (Federal Reserve Bank of Minneapolis. Research Department) Number: 372 Abstract:
Typical incomplete markets models in international economics make two assumptions. First, households are not able to fully insure themselves against country-specific shocks. Second, there is a representative household within each country, so that households are fully insured against idiosyncratic shocks. We assume instead that cross-household risk-sharing is limited within countries, but cross-country risk-sharing is complete. We consider two types of limited risk-sharing: domestically incomplete markets (DI) and private information-Pareto optimal (PIPO) risk-sharing. We show that the models imply distinct restrictions between the cross-sectional distributions of consumption and real exchange rates. We evaluate these restrictions using household-level consumption data from the United States and the United Kingdom. We show that the PIPO restriction fits the data well when households have a coefficient of relative risk aversion of around 5. The analogous restrictions implied by the representative agent model and the DI model are rejected at conventional levels of significance.
Stichwort: Market incompleteness, Real exchange rate, Precautionary savings, and Pareto optimality Fach: E21 - Macroeconomics: Consumption; Saving; Wealth, F31 - Foreign Exchange, and D63 - Equity, Justice, Inequality, and Other Normative Criteria and Measurement