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Asset Price Bubbles and Monetary Policy: Revisiting the Nexus at the Zero Lower Bound

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  • Jacopo Bonchi

    (Department of Social Sciences and Economics, Sapienza University of Rome)

Abstract
Asset price bubbles are a major source of macroeconomic instability, but can they play a stabilizing role in a low interest rates environment? To answer this question, I study an economy in which the natural rate of interest declines permanently and a long-lasting zero lower bound (ZLB) episode makes risk-free interest rates persistently low. Asset price bubbles redistribute wealth across generations because of the life-cycle pattern of net worth. In this way, they increase the natural interest rate by serving as a store of value for older cohorts and as a collateral for the younger ones, and the central bank can escape from the ZLB with consequent output gains. Therefore, the redistribution of wealth/consumption across generations, which would be welfare-reducing in normal times, becomes welfare-enhancing. However, asset price bubbles affect mainly the natural interest rate through their role of collateral, and a leveraged bubble is the most detrimental for output when it crashes (Jordá et al., 2015).

Suggested Citation

  • Jacopo Bonchi, 2020. "Asset Price Bubbles and Monetary Policy: Revisiting the Nexus at the Zero Lower Bound," Working Papers 9/20, Sapienza University of Rome, DISS.
    • Handle: RePEc:saq:wpaper:9/20
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    References listed on IDEAS

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    More about this item

    Keywords

    Asset price bubbles; Natural interest rate; Zero lower bound;
    All these keywords.

    JEL classification:

    • E13 - Macroeconomics and Monetary Economics - - General Aggregative Models - - - Neoclassical
    • 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

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