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Monetary Policy for a Bubbly World

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  • Ventura, Jaume
  • Asriyan, Vladimir
  • Fornaro, Luca
  • Martín, Alberto

Abstract

What is the role of monetary policy in a bubbly world? To address this question, we study an economy in which financial frictions limit the supply of assets. The ensuing scarcity generates a demand for “unbacked†assets, i.e., assets that are backed only by the expectation of their future value. We consider two types of unbacked assets: bubbles, which are created by the private sector, and money, which is created by the central bank. Bubbles and money share many features, but they also differ in two crucial respects. First, while the rents from the creation of bubbles accrue to entrepreneurs and foster investment, the rents from money creation accrue to the central bank. Second, while bubbles are driven by market psychology, and can rise and fall according to the whims of the market, money is under the control of the central bank. We characterize the optimal monetary policy and show that, through its ability to supply assets, monetary policy plays a key role in the bubbly world. The model sheds light on the recent expansion of central bank liabilities in response to the bursting of bubbles.

Suggested Citation

  • Ventura, Jaume & Asriyan, Vladimir & Fornaro, Luca & Martín, Alberto, 2019. "Monetary Policy for a Bubbly World," CEPR Discussion Papers 13803, C.E.P.R. Discussion Papers.
  • Handle: RePEc:cpr:ceprdp:13803
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    More about this item

    Keywords

    Bubbles; Financial frictions; Optimal monetary policy; Liquidity trap;
    All these keywords.

    JEL classification:

    • 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
    • O40 - Economic Development, Innovation, Technological Change, and Growth - - Economic Growth and Aggregate Productivity - - - General

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