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Complete Markets Strikes Back: Revisiting Risk Sharing Tests under Discount Rate Heterogeneity

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  • Sun, Gang

Abstract

Recent risk sharing tests strongly reject the hypothesis of complete markets, because in the data: (1) the individual consumption comoves with income and (2) the consumption dispersion increases over the life cycle. In this paper, I revisit the implications of these risk sharing tests in the context of a complete market model with discount rate heterogeneity, which is extended to introduce the individual choices of effort in education. I .nd that a complete market model with discount rate heterogeneity can pass both types of the risk sharing tests. The endogenous positive correlation between income growth rate and patience makes the individual consumption comove with income, even if the markets are complete. I also show that this model is quantitatively admissible to account for both the observed comovement of consumption and income and the increase of consumption dispersion over the life cycle.

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  • Sun, Gang, 2013. "Complete Markets Strikes Back: Revisiting Risk Sharing Tests under Discount Rate Heterogeneity," SIRE Discussion Papers 2013-96, Scottish Institute for Research in Economics (SIRE).
    • Handle: RePEc:edn:sirdps:513
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    1. Sun, Gang, 2013. "Consumption Inequality and Discount Rate Heterogeneity," SIRE Discussion Papers 2013-97, Scottish Institute for Research in Economics (SIRE).
    2. Gang Sun, 2013. "Consumption Inequality and Discount Rate Heterogeneity," Discussion Paper Series, School of Economics and Finance 201318, School of Economics and Finance, University of St Andrews.

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    complete markets; discount rate heterogeneity; risk sharing;
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