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Consumption Inequality and Discount Rate Heterogeneity

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  • Gang Sun

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    (University of St Andrews)

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Abstract

Although standard incomplete market models can account for the magnitude of the rise in consumption inequality over the life cycle, they generate unrealistically concave age profiles of consumption inequality and unrealistically less wealth inequality. In this paper, I investigate the role of discount rate heterogeneity on consumption inequality in the context of incomplete market life cycle models. The distribution of discount rates is estimated using moments from the wealth distribution. I find that the model with heterogeneous income profiles (HIP) and discount rate heterogeneity can successfully account for the empirical age profile of consumption inequality, both in its magnitude and in its non-concave shape. Generating realistic wealth inequality, this simulated model also highlights the importance of ex ante heterogeneities as main sources of life time inequality.

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Paper provided by Department of Economics, University of St. Andrews in its series Discussion Paper Series, Department of Economics with number 201318.

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Handle: RePEc:san:wpecon:1318

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Keywords: consumption inequality discount rate heterogeneity life cycle risk sharing;

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