Tests of the Rational Expectations Hypothesis
回顾多项实证研究,比较理性预期假说与其他预期模型,发现证据足以让人不再相信理性预期概念,因此不应默认预期是理性的,而应检验结果对不同预期结构的敏感性。
This paper reviews evidence on the structure of anticipation from a number of empirical studies. Jack Muth's "rational expectations hypothesis" is compared with a variety of alternative models, including Ferber's Law, the "implicit expectations" model of Edwin Mills, and Muth's new "errors in the variables" model. The cumulative evidence is of such strength as to compel the suspension of belief in the concept of rational expectations. This implies that it is a mistake to proceed under the maintained hypothesis that expectations are rational; instead, it is necessary to test the sensitivity of empirical and theoretical results to alternative assumptions about the structure by which anticipations are generated. Copyright 1986 by American Economic Association.