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Journal of Business Cycle Research (2022) 18:239–259
https://doi.org/10.1007/s41549-022-00074-w
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RESEARCH PAPER
A New Theory ofExpectations
RichardT.Curtin1
Received: 8 November 2021 / Accepted: 18 August 2022 / Published online: 5 September 2022
© The Author(s), under exclusive licence to Springer Nature Switzerland AG 2022
Abstract
Expectations are essential for understanding the economic choices of individuals as
well as cyclical developments in an economy over time. The initial theory of how
people form their expectations was first introduced by Aristotle more than two mil-
lennia ago. The core elements he advanced were that forward-looking decisions
must be based on expectations and those expectations must be formed by reason,
free from the corrupting influence of passion. These guidelines have been formal-
ized in theories of rational expectations. There has been no consensus among social
scientists, however, about whether rationality should be defined by how expecta-
tions are formed (favored in psychology) or by the outcomes of the formation pro-
cess (favored in economics). Data collected by the University of Michigan over the
past half-century appear to support both views: the psychological thesis of bounded
rationality in the formation of expectations by individuals as well as the unbounded
rationality thesis of economics when applied to the expectations observed across the
entire economy. The goal of this paper is to correct empirical misspecifications, and
to incorporate recent advances in neuroscience, including the dominance of noncon-
scious processes over conscious deliberation, the critical role of affective evalua-
tions, and the formation of expectations by a Bayesian updating procedure. The new
theory highlights the importance of contextual factors, and provides a more accu-
rate assessment of costs and benefits. Although these innovations represent a radical
departure from orthodox theories, they are justified by the increase in explanatory
power provided by this new theory of expectations.
Keywords Expectation theory· Measurement of expectations· Non-conscious
cognitive expectations· Cyclical indicators
Isaac Kerstenetzky Lifetime Scholarly Achievement Award Lecture, presented at the 2021 CIRET
Conference held at Poznan, Poland on September 16, 2021 (www.ciret.org).
* Richard T. Curtin
Curtin@umich.edu
1 University ofMichigan, AnnArbor, USA
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