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Mundell–Fleming without the LM curve: the exogenous interest rate in an open economy

Author

Listed:
  • Franklin Serrano

    (Instituto de Economia, Universidade Federal do Rio de Janeiro, Brazil)

  • Ricardo Summa

    (Instituto de Economia, Universidade Federal do Rio de Janeiro, Brazil)

Abstract

In this paper we evaluate critically the popular Mundell–Fleming model from the heterodox standpoint of the exogenous interest-rate approach. We criticize the assumptions of exogenous money supply, 'perfect' international capital markets and inelastic exchange-rate expectations. We show that in a more realistic framework none of the main results of the Mundell–Fleming model on the relative effectiveness of fiscal and monetary policies is valid, either in floating and fixed exchange-rate regimes. We conclude that, within certain very asymmetric bounds, the Central Bank has the power to determine the domestic interest rate exogenously even in open economy with free capital mobility and that there is no automatic market mechanism to ensure the automatic adjustment of the interest rate and exchange rate to sustainable levels.

Suggested Citation

  • Franklin Serrano & Ricardo Summa, 2015. "Mundell–Fleming without the LM curve: the exogenous interest rate in an open economy," Review of Keynesian Economics, Edward Elgar Publishing, vol. 3(2), pages 248-268, April.
    • Handle: RePEc:elg:rokejn:v:3:y:2015:i:2:p248-268
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    Citations

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    Cited by:

    1. George Pantelopoulos, 2024. "Can external sustainability be decoupled from the NIIP?," International Economics and Economic Policy, Springer, vol. 21(1), pages 89-116, February.
    2. Emboava Vaz, João, 2024. "Impacts of US interest rates on growth, income distribution, and macroeconomic policy space in developing countries: A SFC supermultiplier model," IPE Working Papers 228/2024, Berlin School of Economics and Law, Institute for International Political Economy (IPE).
    3. Pablo Gabriel Bortz & Nicole Toftum & Nicolás Hernán Zeolla, 2021. "Old Cycles and New Vulnerabilities: Financial Deregulation and the Argentine Crisis," Development and Change, International Institute of Social Studies, vol. 52(3), pages 598-626, May.
    4. Summa, Ricardo de Figueiredo, 2022. "Alternative uses of functional finance: Lerner, MMT and the Sraffiansh," IPE Working Papers 175/2021, Berlin School of Economics and Law, Institute for International Political Economy (IPE).
    5. Karsten Kohler & Engelbert Stockhammer, 2023. "Flexible exchange rates in emerging markets: shock absorbers or drivers of endogenous cycles?," Industrial and Corporate Change, Oxford University Press and the Associazione ICC, vol. 32(2), pages 551-572.
    6. Dvoskin, Ariel & Libman, Emiliano, 2024. "On the Separation between Prices and Quantities. A Note on the Interest Rate as an Artifact of Self-Validating Beliefs," Centro Sraffa Working Papers CSWP68, Centro di Ricerche e Documentazione "Piero Sraffa".
    7. Ricardo Summa & Franklin Serrano, 2018. "Distribution and Conflict Inflation in Brazil under Inflation Targeting, 1999–2014," Review of Radical Political Economics, Union for Radical Political Economics, vol. 50(2), pages 349-369, June.

    More about this item

    Keywords

    Mundell–Fleming; exogenous interest rate; economic policy;
    All these keywords.

    JEL classification:

    • E51 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - Money Supply; Credit; Money Multipliers
    • E58 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - Central Banks and Their Policies
    • F31 - International Economics - - International Finance - - - Foreign Exchange
    • F41 - International Economics - - Macroeconomic Aspects of International Trade and Finance - - - Open Economy Macroeconomics

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