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Cryptocurrencies, Currency Competition, and The Impossible Trinity

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  • Benigno, Pierpaolo
  • Uhlig, Harald
  • Schilling, Linda

Abstract

We analyze a two-country economy with complete markets, featuring two national currencies as well as a global (crypto)currency. If the global currency is used in both countries, the national nominal interest rates must be equal and the exchange rate between the national currencies is a risk-adjusted martingale. Deviation from interest rate equality implies the risk of approaching the zero lower bound or the abandonment of the national currency. We call this result Crypto-Enforced Monetary Policy Synchronization (CEMPS). If the global currency is backed by interest- bearing assets, additional and tight restrictions on monetary policy arise. Thus, the classic Impossible Trinity becomes even less reconcilable.

Suggested Citation

  • Benigno, Pierpaolo & Uhlig, Harald & Schilling, Linda, 2022. "Cryptocurrencies, Currency Competition, and The Impossible Trinity," CEPR Discussion Papers 13943, C.E.P.R. Discussion Papers.
  • Handle: RePEc:cpr:ceprdp:13943
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    More about this item

    Keywords

    Currency competition; Cryptocurrency; Impossible trinity; Exchange rates; Uncovered interest parity; Independent monetary policy;
    All these keywords.

    JEL classification:

    • E4 - Macroeconomics and Monetary Economics - - Money and Interest Rates
    • F31 - International Economics - - International Finance - - - Foreign Exchange
    • D53 - Microeconomics - - General Equilibrium and Disequilibrium - - - Financial Markets
    • G12 - Financial Economics - - General Financial Markets - - - Asset Pricing; Trading Volume; Bond Interest Rates

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