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A macroeconomic model with heterogeneous and financially-constrained intermediaries

Author

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  • Thomas Lejeune

    () (Economics and Research Department, National Bank of Belgium)

  • Raf Wouters

    () (Economics and Research Department, National Bank of Belgium)

Abstract

This paper analyses the risk amplification inherent in a macroeconomic model with a heterogeneous financial sector. It extends a model with an equity-constrained intermediary by adding a shadow banking intermediary with pro-cyclical leverage. It is shown that the inclusion of this intermediary significantly amplifies financial frictions and adds to financial instability. Quantitative effects on asset prices are magnified, and the amplification propagates to the real side of the macroeconomy. Reducing the size of the shadow banking sector involves a trade-off between stabilizing the economy and the expected growth of economic activity. Ignoring the heterogeneity of the financial sector may lead to an underestimation of the excess risk-taking due to the anticipation of expansionary policies and of financial and macroeconomic responses to shocks.

Suggested Citation

  • Thomas Lejeune & Raf Wouters, 2019. "A macroeconomic model with heterogeneous and financially-constrained intermediaries," Working Paper Research 367, National Bank of Belgium.
  • Handle: RePEc:nbb:reswpp:201902-367
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    File URL: https://www.nbb.be/doc/oc/repec/reswpp/wp367en.pdf
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    More about this item

    Keywords

    Financial frictions; Financial constraints; Endogenous risk; Shadow banking;

    JEL classification:

    • G2 - Financial Economics - - Financial Institutions and Services
    • G12 - Financial Economics - - General Financial Markets - - - Asset Pricing; Trading Volume; Bond Interest Rates
    • E44 - Macroeconomics and Monetary Economics - - Money and Interest Rates - - - Financial Markets and the Macroeconomy

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