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Monetary Policy, Financing Constraints, and Rational Asset Price Bubbles

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  • Junming Chen

Abstract

This paper studies the issue of “should monetary policy lean against rational asset price bubbles†by establishing an analytically tractable New Keynesian model with endogenous capital accumulation. Rational bubbles may exist in equilibrium because of the extra liquidity they generate for financially constrained firms when a lumpy investment opportunity arrives. Under certain conditions, bounded bubble-driven fluctuations (in output) may emerge via both supply-side and demand-side mechanisms. The monetary policy analyses of the model do not strongly favor a leaning-against-the-bubble strategy and emphasize a special overreaction risk that it may suffer from relative to its conventional counterpart.

Suggested Citation

  • Junming Chen, 2025. "Monetary Policy, Financing Constraints, and Rational Asset Price Bubbles," Discussion Papers 25/04, Department of Economics, University of York.
  • Handle: RePEc:yor:yorken:25/04
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    References listed on IDEAS

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    1. Ben S. Bernanke & Mark Gertler, 2001. "Should Central Banks Respond to Movements in Asset Prices?," American Economic Review, American Economic Association, vol. 91(2), pages 253-257, May.
    2. Junming Chen, 2025. "Monetary Policy, Financing Constraints, and Rational Asset Price Bubbles," Discussion Papers 25/04, Department of Economics, University of York.
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    1. Junming Chen, 2025. "Monetary Policy, Financing Constraints, and Rational Asset Price Bubbles," Discussion Papers 25/04, Department of Economics, University of York.

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    Keywords

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    JEL classification:

    • E12 - Macroeconomics and Monetary Economics - - General Aggregative Models - - - Keynes; Keynesian; Post-Keynesian; Modern Monetary Theory
    • E22 - Macroeconomics and Monetary Economics - - Consumption, Saving, Production, Employment, and Investment - - - Investment; Capital; Intangible Capital; Capacity
    • E32 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Business Fluctuations; Cycles
    • E44 - Macroeconomics and Monetary Economics - - Money and Interest Rates - - - Financial Markets and the Macroeconomy
    • E52 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - Monetary Policy
    • E63 - Macroeconomics and Monetary Economics - - Macroeconomic Policy, Macroeconomic Aspects of Public Finance, and General Outlook - - - Comparative or Joint Analysis of Fiscal and Monetary Policy; Stabilization; Treasury Policy
    • G12 - Financial Economics - - General Financial Markets - - - Asset Pricing; Trading Volume; Bond Interest Rates

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