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Aggregate Implications of a Credit Crunch: The Importance of Heterogeneity

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  • Francisco J. Buera
  • Benjamin Moll

Abstract

We take an off-the-shelf model with financial frictions and heterogeneity, and study the mapping from a credit crunch, modeled as a shock to collateral constraints, to simple aggregate wedges. We study three variants of this model that only differ in the form of underlying heterogeneity. We find that in all three model variants a credit crunch shows up as a different wedge: efficiency, investment, and labor wedges. Furthermore, all three model variants have an undistorted Euler equation for the aggregate of firm owners. These results highlight the limitations of using representative agent models to identify sources of business cycle fluctuations. (JEL E22, E23, E32, E43, E44)

Suggested Citation

  • Francisco J. Buera & Benjamin Moll, 2015. "Aggregate Implications of a Credit Crunch: The Importance of Heterogeneity," American Economic Journal: Macroeconomics, American Economic Association, vol. 7(3), pages 1-42, July.
    • Handle: RePEc:aea:aejmac:v:7:y:2015:i:3:p:1-42
    Note: DOI: 10.1257/mac.20130212
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    More about this item

    JEL classification:

    • E22 - Macroeconomics and Monetary Economics - - Consumption, Saving, Production, Employment, and Investment - - - Investment; Capital; Intangible Capital; Capacity
    • E23 - Macroeconomics and Monetary Economics - - Consumption, Saving, Production, Employment, and Investment - - - Production
    • E32 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Business Fluctuations; Cycles
    • E43 - Macroeconomics and Monetary Economics - - Money and Interest Rates - - - Interest Rates: Determination, Term Structure, and Effects
    • E44 - Macroeconomics and Monetary Economics - - Money and Interest Rates - - - Financial Markets and the Macroeconomy

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