Cross-Dynastic Intergenerational Altruism

Research Seminars: Environmental Economics Brownbag Seminar

A concern for sustainability leads to cross-dynastic intergenerational altruism, defined as welfare weights on descendants also in other dynasties. Cross-dynastic intergenerational altruism gives rise to preference externalities because savings for one’s own descendants benefit present members of other dynasties. Furthermore, the structure of cross-dynastic altruistic links forward in time imply that each dynasty has time inconsistent preferences. In a stationary Markov-perfect equilibrium, the saving rate is increasing in cross-dynastic intergenerational altruism and decreasing in the number of dynasties. In the limiting case, when the number of dynasties goes to infinity, the equilibrium saving rate equals the saving rate without cross-dynastic intergenerational altruism. The efficient saving rate with cross-dynastic intergenerational altruism is substantially higher than the equilibrium saving rate. The analysis offers new insights on the "isolation paradox", behavioral welfare economics, "hyperbolic" discounting and interdependent utility.

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ZEW – Leibniz-Zentrum für Europäische Wirtschaftsforschung

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ZEW – Leibniz-Zentrum für Europäische Wirtschaftsforschung

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