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CBDC and the operational framework of monetary policy

Author

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  • Jorge Abad
  • Galo Nuño Barrau
  • Carlos Thomas

Abstract

We analyze the impact of introducing a central bank-issued digital currency (CBDC) on the operational framework of monetary policy and the macroeconomy as a whole. To this end, we develop a New Keynesian model with heterogeneous banks, a frictional interbank market, a central bank with deposit and lending facillities, and household preferences for different liquid assets. The model is calibrated to replicate the main monetary and financial aggregates in the euro area. Our analysis predicts that CBDC adoption implies a roughly equivalent reduction in banks' deposit funding. However, this 'deposit crunch' has a rather small effect on bank lending to the real economy, and hence on aggregate investment and GDP. This result reflects the parallel impact of CBDC on the central bank's operational framework. For relatively moderate CBDC adoption levels, the reduction in deposits is absorbed by an almost one-to-one fall in reserves at the central bank, implying a transition from a 'floor' system –with ample reserves– to a 'corridor' one. For larger CBCD adoption, the loss of bank deposits is compensated by increased recourse to central bank credit, as the corridor system gives way to a 'ceiling' one with scarce reserves.

Suggested Citation

  • Jorge Abad & Galo Nuño Barrau & Carlos Thomas, 2023. "CBDC and the operational framework of monetary policy," BIS Working Papers 1126, Bank for International Settlements.
  • Handle: RePEc:bis:biswps:1126
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    Cited by:

    1. Caccia, Enea & Tapking, Jens & Vlassopoulos, Thomas, 2024. "Central bank digital currency and monetary policy implementation," Occasional Paper Series 345, European Central Bank.
    2. Lorenzo Burlon & Manuel A. Muñoz & Frank Smets, 2024. "The Optimal Quantity of CBDC in a Bank-Based Economy," American Economic Journal: Macroeconomics, American Economic Association, vol. 16(4), pages 172-217, October.
    3. Alberto Di Iorio & Anneke Kosse & Ilaria Mattei, 2024. "Embracing diversity, advancing together - results of the 2023 BIS survey on central bank digital currencies and crypto," BIS Papers, Bank for International Settlements, number 147.
    4. Sebastian Infante & Kyungmin Kim & Anna Orlik & André F. Silva & Robert J. Tetlow, 2023. "Retail Central Bank Digital Currencies: Implications for Banking and Financial Stability," Finance and Economics Discussion Series 2023-072, Board of Governors of the Federal Reserve System (U.S.).
    5. Bindseil, Ulrich & Marrazzo, Marco & Sauer, Stephan, 2024. "The impact of central bank digital currency on central bank profitability, risk-taking and capital," Occasional Paper Series 360, European Central Bank.
    6. Georgakas, Ioannis, 2025. "Central Bank Digital Coins (CBDCs) and Monetary Sovereignty: Opportunities and Risks in the European Context," MPRA Paper 124457, University Library of Munich, Germany.
    7. Ozili, Peterson K, 2024. "Thinking Fast and Slow about Central Bank Digital Currencies," MPRA Paper 120774, University Library of Munich, Germany.
    8. Bindseil, Ulrich & Senner, Richard, 2024. "Macroeconomic modelling of CBDC: a critical review," Working Paper Series 2978, European Central Bank.

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    More about this item

    Keywords

    central bank digital currency; interbank market; search and matching frictions; reserves;
    All these keywords.

    JEL classification:

    • 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
    • E52 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - Monetary Policy
    • G21 - Financial Economics - - Financial Institutions and Services - - - Banks; Other Depository Institutions; Micro Finance Institutions; Mortgages

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