Journal
REVIEW OF ECONOMIC DYNAMICS
Volume 4, Issue 3, Pages 519-535Publisher
ACADEMIC PRESS INC
DOI: 10.1006/redy.2001.0132
Keywords
robustness; model misspecification; monetary policy; rational expectations
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We explore methods for confronting model misspecification in macroeconomics. We construct dynamic equilibria in which private agents and policy makers recognize that models are approximations. We explore two generalizations of rational expectations equilibria. In one of these equilibria, decision-makers use dynamic evolution equations that are imperfect statistical approximations, and in the other misspecification is impossible to detect even from infinite samples of time series data. In the first of these equilibria, decision rules are tailored to be robust to the allowable statistical discrepancies. Using frequency domain methods, we show that robust decision-makers treat model misspecification like time series econometricians. (C) 2001 Academic Press.
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