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Idiosyncratic Income Risk and Aggregate Fluctuations

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  • Davide Debortoli
  • Jordi Galí

Abstract

We study the role of idiosyncratic income shocks for aggregate fluctuations within a simple heterogeneous household framework with no binding borrowing constraints. We show that the presence of idiosyncratic income shocks affects the economy’s response to an aggregate shock in a way that can be captured by a consumption weighted average of the changes in uncertainty generated by the shock. We apply this framework to two example economies —an endowment economy and a New Keynesian economy— and show that under plausible calibrations the impact of idiosyncratic income shocks on aggregate fluctuations is quantitatively small, since most of the changes in uncertainty are concentrated among poorer (low consumption) households.

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  • Davide Debortoli & Jordi Galí, 2022. "Idiosyncratic Income Risk and Aggregate Fluctuations," NBER Working Papers 29704, National Bureau of Economic Research, Inc.
    • Handle: RePEc:nbr:nberwo:29704
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    Cited by:

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    3. Stéphane Dupraz, 2023. "The Dynamic IS Curve when there is both Investment and Savings," Working papers 905, Banque de France.
    4. Luzie Thiel, 2023. "Monetary Policy and Inequality: A Two-way Relation," MAGKS Papers on Economics 202304, Philipps-Universität Marburg, Faculty of Business Administration and Economics, Department of Economics (Volkswirtschaftliche Abteilung).

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    More about this item

    JEL classification:

    • E21 - Macroeconomics and Monetary Economics - - Consumption, Saving, Production, Employment, and Investment - - - Consumption; Saving; Wealth
    • E32 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Business Fluctuations; Cycles

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