Informational efficiency properties of rational expectations equilibria in non-convex economies

Summary. A simple example shows that although non-convexities might prevent the existence of a fully revealing rational expectations equilibrium, they need not prevent the existence of a non-informative one. Indeed, the economy in this example does not possess any fully revealing equilibria, but does have a continuum of non-informative ones. Received: February 9, 1999; revised version: October 20, 1999     

Agency and Anxiety

In this paper, we introduce the psychological concept of anxiety into agency theory. An important benchmark in the anxiety literature is the inverted-U hypothesis, which states that an increase in anxiety improves performance when anxiety is low, but reduces it when anxiety is high. We show that the inverted-U hypothesis is consistent with evidence that high-powered incentives can reduce the agent's optimal effort and expected performance. In equilibrium, however, a profit-maximizing principal never offers such counterproductive incentives. We also show that the inverted-U hypothesis can explain empirical anomalies related to monitoring, the informativeness principle, and the risk–reward tradeoff.     

ANXIETY AND PERFORMANCE: AN ENDOGENOUS LEARNING‐BY‐DOING MODEL*

In this article, we show that a standard economic model, the endogenous learning‐by‐doing model, captures several major themes from the anxiety literature in psychology. In our model, anxiety is a fully endogenous construct that can be separated naturally into its cognitive and physiological components. As such, our results are directly comparable with hypotheses and evidence from psychology. We show that anxiety can serve a motivating function, which suggests potential applications in the principal–agent literature.

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Consumer default with complete markets: default-based pricing and finite punishment

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