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From Money Aggregates to Interest Rate Rules in a Small Open Economy: A Second Order Approach


  • Carlos Montoro

    () (Economics LSE)

  • Paul Castillo
  • Vicente Tuesta


We evaluate the second order solution of a general equilibrium model for a small open economy in the line of the "new open economy macroeconomics". We use this framework to explain some recent regularities observed in economies in which central banks move from using a money aggregate as the target towards a regime based on the control of the short-term interest rate. In particular, in those economies we observe that after the change of policy rule there is a decrease in the unconditional volatilities accompanied by a reduction in the unconditional mean in inflation and interest rates vis-a-vis an increase in the unconditional mean in money aggregates. By analyzing the second order solution we relax the assumption of certainty equivalence which permit us to consider the role of uncertainty in the equilibrium solution. Overall, unlike the linear approach, the second order solution of the model allow us to capture the decrease in the unconditional means of interest rate and inflation along with an increase in the unconditional mean of the money demand as a consequence of the reduction of volatility due to the change of regime, as it is observed in the data. The main mechanism stems from different forms of risks that arise from the second order solution.

Suggested Citation

  • Carlos Montoro & Paul Castillo & Vicente Tuesta, 2006. "From Money Aggregates to Interest Rate Rules in a Small Open Economy: A Second Order Approach," Computing in Economics and Finance 2006 17, Society for Computational Economics.
  • Handle: RePEc:sce:scecfa:17

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    Cited by:

    1. Adrián Armas & Francisco Grippa, 2005. "Fijación de metas inflacionarias en una economía dolarizada: la experiencia de Perú," Research Department Publications 4424, Inter-American Development Bank, Research Department.
    2. Adrián Armas & Francisco Grippa, 2008. "Metas de inflación en una economía dolarizada: La experiencia del Perú," Revista de Análisis del BCB, Banco Central de Bolivia, vol. 10(1), pages 7-44, December.
    3. Adrián Armas & Francisco Grippa, 2005. "Targeting Inflation in a Dollarized Economy: The Peruvian Experience," Research Department Publications 4423, Inter-American Development Bank, Research Department.

    More about this item


    Small Open Economy Model; Incomplete Markets; Second Order Solution;

    JEL classification:

    • E52 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - Monetary Policy
    • E42 - Macroeconomics and Monetary Economics - - Money and Interest Rates - - - Monetary Sytsems; Standards; Regimes; Government and the Monetary System
    • E12 - Macroeconomics and Monetary Economics - - General Aggregative Models - - - Keynes; Keynesian; Post-Keynesian


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