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Overborrowing and Systemic Externalities in the Business Cycle

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Author Info
Bianchi, Javier
Abstract

Credit constraints that link a private agent's debt to market-determined prices embody a systemic credit externality that drives a wedge between competitive and (constrained) socially optimal equilibria, which induces private agents to ``overborrow". We quantify the effects of this externality in a two-sector DSGE model of a small open economy calibrated to emerging markets. Debt is denominated in units of tradable goods, and is constrained not to exceed a fraction of income, including nontradables income valued at the relative price of nontradables. The externality arises because agents fail to internalize the price effects of their individual borrowing, and hence the adverse debt-deflation amplification effects of negative income shocks that trigger a binding credit constraint. Quantitatively, the credit externality causes a modest increase in average debt, of about 2 percentage points of GDP, but it triples the probability of financial crises and doubles the average current account and consumption reversals caused by these crises.

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Publisher Info
Paper provided by University Library of Munich, Germany in its series MPRA Paper with number 16270.

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Date of creation: 28 Apr 2009
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Handle: RePEc:pra:mprapa:16270

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Related research
Keywords: Financial Crises; Business Cycles; Amplification Effects; Sudden Stops; Systemic Externalities;

Find related papers by JEL classification:
D62 - Microeconomics - - Welfare Economics - - - Externalities
F20 - International Economics - - International Factor Movements and International Business - - - General
E32 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Business Fluctuations; Cycles
F32 - International Economics - - International Finance - - - Current Account Adjustment; Short-term Capital Movements
F30 - International Economics - - International Finance - - - General
F41 - International Economics - - Macroeconomic Aspects of International Trade and Finance - - - Open Economy Macroeconomics

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Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
  1. Enrique G. Mendoza, 2002. "Credit, Prices, and Crashes: Business Cycles with a Sudden Stop," NBER Chapters, in: Preventing Currency Crises in Emerging Markets, pages 335-392 National Bureau of Economic Research, Inc. [Downloadable!]
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  2. Aiyagari, S Rao, 1994. "Uninsured Idiosyncratic Risk and Aggregate Saving," The Quarterly Journal of Economics, MIT Press, vol. 109(3), pages 659-84, August. [Downloadable!] (restricted)
    Other versions:
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