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Rational speculators and exchange rate volatility
This paper examines whether rational, fully informed speculators will smooth exchange rates. Friedman's (1953) claim that they must do so is challenged, based on the exclusion of interest rate differentials from his interpretation of speculator behavior. Once one recognizes that interest rates matter to speculators, it becomes apparent that rational speculators could sometimes violate Friedman's description of their behavior, and buy currency when its value is relatively high or sell currency when its value is low. For this reason the presence of rational, fully informed speculators may ...
Working Paper
Indeterminacy and Imperfect Information
We study equilibrium determination in an environment where two kinds of agents have different information sets: The fully informed agents know the structure of the model and observe histories of all exogenous and endogenous variables. The less informed agents observe only a strict subset of the full information set. All types of agents form expectations rationally, but agents with limited information need to solve a dynamic signal extraction problem to gather information about the variables they do not observe. We show that for parameter values that imply a unique equilibrium under full ...
Working Paper
Intrinsic expectations persistence: evidence from professional and household survey expectations
This paper examines the expectations behavior of individual responses in the Survey of Professional Forecasters, the University of Michigan?s Survey Research Center survey of consumers, and the ECB Survey of Professional Forecasters. It finds that the most robust feature of all of these expectations measures is that respondents inefficiently revise their forecasts, significantly underreacting to new information. As a consequence, revisions smooth through arriving information, and expectations forget past information at a rapid rate and appear to anchor to the unconditional mean or other ...
Working Paper
Expectations as a source of macroeconomic persistence: an exploration of firms' and households' expectation formation
While there is little question that expectations lie at the heart of much economic decision-making, and therefore at the heart of models of the macroeconomy that hope to reflect such decision-making, how such expectations are formed is an open research question. In earlier work, Fuhrer (2015) showed that empirical estimates of a standard dynamic stochastic general equilibrium (DSGE) model preferred inertia in expectations over price indexation or habit formation as a mechanism to explain the persistence of aggregate time series for output, inflation, and interest rates. A question left open ...
Working Paper
Understanding Uncertainty Shocks and the Role of Black Swans
Economic uncertainty is a powerful force in the modern economy. Research shows that surges in uncertainty can trigger business cycles, bank runs and asset price fluctuations. But where do sudden surges in uncertainty come from? This paper provides a data-disciplined theory of belief formation that explains large fluctuations in uncertainty. It argues that people do not know the true distribution of macroeconomic outcomes. Like Bayesian econometricians, they estimate a distribution. Our main contribution is to explain why real-time estimation of distributions with non-normal tails results in ...
Working Paper
A Comprehensive Empirical Evaluation of Biases in Expectation Formation
We revisit predictability of forecast errors in macroeconomic survey data, which is often taken as evidence of behavioral biases at odds with rational expectations. We argue that to reject rational expectations, one must be able to predict forecast errors out of sample. However, the regressions used in the literature often perform poorly out of sample. The models seem unstable and could not have helped to improve forecasts with access only to available information. We do find some notable exceptions to this finding, in particular mean bias in interest rate forecasts, that survive our ...
Working Paper
Modeling the Evolution of Expectations and Uncertainty in General Equilibrium
We develop methods to solve general equilibrium models in which forward-looking agents are subject to waves of pessimism, optimism, and uncertainty that turn out to critically affect macroeconomic outcomes. Agents in the model are fully rational, conduct Bayesian learning, and they know that they do not know. Therefore, agents take into account that their beliefs will evolve according to what they will observe. This framework accommodates both gradual and abrupt changes in beliefs and allows for an analytical characterization of uncertainty. Shocks to beliefs affect economic dynamics and ...