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Rationality of Expectations: Another OCA Criterion? A DSGE Analysis

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  • Andrzej Torój

    (Ministry of Finance in Poland and Warsaw School of Economics)

Abstract

The Walters critique of EMU presumed that pro-cyclical country-specific real interest rates would incorporate significant macroeconomic instability in an environment of asymmetric shocks. The literature on optimum currency areas suggests a number of criteria to minimize this risk, such as market flexibility, high degrees of openness, financial integration or similarity in inflation rates. In this paper, we argue that an essential part of macroeconomic volatility in a monetary union's member country also depends on the mechanism of forming expectations. This is mainly due to (i) the construction of ex ante countryspecific real interest rate, implying a strong or weak negative correlation with current inflation rate and (ii) anticipated (and hence smoothed) loss in competitiveness and boom-bust cycle. In a 2-region 2-sector New Keynesian DSGE model, we apply 5 different specifications of ex ante real interest rates, based on commonly considered types of expectations: rational, adaptive, static, extrapolative and regressive, as well as their hybrids. Our simulations show that rational expectations dominate the other specifications in terms of minimizing the volatility of the most macroeconomic variables. This conclusion is generally insensitive to which group of agents (producers or consumers) and which region (home or foreign) forms the expectations. It also turns out that for some types of expectations theWalters critique indeed applies, i.e. the system does not fulfil the Blanchard-Kahn conditions or the system's companion matrix has explosive eigenvalues.

Suggested Citation

  • Andrzej Torój, 2010. "Rationality of Expectations: Another OCA Criterion? A DSGE Analysis," Central European Journal of Economic Modelling and Econometrics, Central European Journal of Economic Modelling and Econometrics, vol. 2(3), pages 205-252, June.
    • Handle: RePEc:psc:journl:v:2:y:2010:i:3:p:205-252
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    2. Bertasiute, Akvile & Massaro, Domenico & Weber, Matthias, 2020. "The behavioral economics of currency unions: Economic integration and monetary policy," Journal of Economic Dynamics and Control, Elsevier, vol. 112(C).

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    JEL classification:

    • C60 - Mathematical and Quantitative Methods - - Mathematical Methods; Programming Models; Mathematical and Simulation Modeling - - - General
    • F15 - International Economics - - Trade - - - Economic Integration
    • F47 - International Economics - - Macroeconomic Aspects of International Trade and Finance - - - Forecasting and Simulation: Models and Applications

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