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The Limits of onetary Economics: On Money as a Medium of Exchange in Near-Cashless Credit Economies

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  • Zhang, Shengxing
  • Lagos, Ricardo

Abstract

We study the transmission of monetary policy in credit economies where money serves as a medium of exchange. We find that—in contrast to current conventional wisdom in policy-oriented research in monetary economics—the role of money in transactions can be a powerful conduit to asset prices and ultimately, aggregate consumption, investment, output, and welfare. Theoretically, we show that the cashless limit of the monetary equilibrium (as the cash-and-credit economy converges to a pure-credit economy) need not correspond to the equilibrium of the nonmonetary pure-credit economy. Quantitatively, we find that the magnitudes of the responses of prices and allocations to monetary policy in the monetary economy are sizeable—even in the cashless limit. Hence, as tools to assess the effects of monetary policy, monetary models without money are generically poor approximations— even to idealized highly developed credit economies that are able to accommodate a large volume of transactions with arbitrarily small aggregate real money balances.

Suggested Citation

  • Zhang, Shengxing & Lagos, Ricardo, 2019. "The Limits of onetary Economics: On Money as a Medium of Exchange in Near-Cashless Credit Economies," CEPR Discussion Papers 14057, C.E.P.R. Discussion Papers.
    • Handle: RePEc:cpr:ceprdp:14057
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    References listed on IDEAS

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    Cited by:

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    3. Donaldson, Jason Roderick & Piacentino, Giorgia, 2022. "Money runs," Journal of Monetary Economics, Elsevier, vol. 126(C), pages 35-57.
    4. Lebeau, Lucie, 2020. "Credit frictions and participation in over-the-counter markets," Journal of Economic Theory, Elsevier, vol. 189(C).

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    More about this item

    Keywords

    Asset prices; Cashless; Credit; Leverage; Liquidity; Margin; Monetary policy;
    All these keywords.

    JEL classification:

    • D83 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Search; Learning; Information and Knowledge; Communication; Belief; Unawareness
    • E52 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - Monetary Policy
    • G12 - Financial Economics - - General Financial Markets - - - Asset Pricing; Trading Volume; Bond Interest Rates

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