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Testing optimal monetary policy in a currency union

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  • Bjarni G. Einarsson

Abstract

This paper presents a framework for testing the optimality of monetary policy decisions made by a central bank in a monetary union. Applying the framework to test the European Central Bank’s monetary policy decisions we find several instances of optimization failures in its use of the Forward Guidance and Quantitative Easing instruments. We cannot reject optimality in its use of the Target Rate instrument. We find signs of heterogeneity in the optimal prescriptions for the individual member countries with respect to the union level prescription. Additionally, we find many instances of optimization failure at the country level for all instruments. Assuming each country has a country specific version of the union loss function we provide a measure of the cost of abandoning independent monetary policy by joining a union. The results indicate that the price of Euro membership is higher for the peripheral economies.

Suggested Citation

  • Bjarni G. Einarsson, 2024. "Testing optimal monetary policy in a currency union," Economics wp96, Department of Economics, Central bank of Iceland.
    • Handle: RePEc:ice:wpaper:wp96
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    JEL classification:

    • C32 - Mathematical and Quantitative Methods - - Multiple or Simultaneous Equation Models; Multiple Variables - - - Time-Series Models; Dynamic Quantile Regressions; Dynamic Treatment Effect Models; Diffusion Processes; State Space Models
    • E31 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Price Level; Inflation; Deflation
    • E32 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Business Fluctuations; Cycles
    • 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
    • E61 - Macroeconomics and Monetary Economics - - Macroeconomic Policy, Macroeconomic Aspects of Public Finance, and General Outlook - - - Policy Objectives; Policy Designs and Consistency; Policy Coordination
    • E65 - Macroeconomics and Monetary Economics - - Macroeconomic Policy, Macroeconomic Aspects of Public Finance, and General Outlook - - - Studies of Particular Policy Episodes

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