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The macroeconomics of central bank digital currencies

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  • Barrdear, John
  • Kumhof, Michael

Abstract

We study the macroeconomic consequences of issuing central bank digital currency (CBDC) - a universally-accessible and interest-bearing central bank liability that competes with bank deposits as medium of exchange. In a DSGE model calibrated to match the pre-2008 US, we find that CBDC issuance of 30% of GDP, against government bonds, could permanently raise GDP by 3%, due to lower real interest rates, distortionary taxes, and monetary transaction costs. Countercyclical CBDC policy rules, as a second monetary policy tool, could substantially improve the central bank’s ability to stabilise the business cycle. Risks to banks can be minimized through appropriate issuance arrangements.

Suggested Citation

  • Barrdear, John & Kumhof, Michael, 2022. "The macroeconomics of central bank digital currencies," Journal of Economic Dynamics and Control, Elsevier, vol. 142(C).
    • Handle: RePEc:eee:dyncon:v:142:y:2022:i:c:s016518892100083x
    DOI: 10.1016/j.jedc.2021.104148
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    More about this item

    Keywords

    Central bank digital currency; Money creation; Money demand; Endogenous money; Banks; Financial intermediation; Bank lending; Distributed ledgers; Blockchain; Countercyclical policy; Seigniorage;
    All these keywords.

    JEL classification:

    • E41 - Macroeconomics and Monetary Economics - - Money and Interest Rates - - - Demand for Money
    • E42 - Macroeconomics and Monetary Economics - - Money and Interest Rates - - - Monetary Sytsems; Standards; Regimes; Government and the Monetary System
    • E44 - Macroeconomics and Monetary Economics - - Money and Interest Rates - - - Financial Markets and the Macroeconomy
    • E51 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - Money Supply; Credit; Money Multipliers
    • E52 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - Monetary Policy
    • E58 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - Central Banks and Their Policies
    • G21 - Financial Economics - - Financial Institutions and Services - - - Banks; Other Depository Institutions; Micro Finance Institutions; Mortgages

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