A Delegation-Based Theory of Expertise

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2015-09-17

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Abstract

We investigate competition in a delegation framework, with a coarsely informed principal. Two imperfectly informed and biased experts simultaneously propose action choices. A principal with a diffuse prior, and only being able to ordinally compare the two proposals, has to choose one of them. The selected expert might receive a bonus payment. We show that having a second expert benefits the principal, even if the two experts have the same biases and the bonus of the winner is zero. In contrast with other models of expertise, in our setting the principal prefers experts with equal rather than opposite biases. Increasing the bonus brings experts closer to truthful reporting, but this only benefits the principal up to a threshold level, with further increases in the bonus strictly decreasing her payoffs. A methodological contribution of our paper is characterizing restrictions on the set of strategies which allows a formal generalization of ex ante expected payoffs to games with diffuse prior.

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Scholars@Duke

Ambrus

Attila Ambrus

Professor of Economics

Professor Ambrus’ research focuses on a broad range of subjects including game theory, experimental economics, microeconomic theory, industrial organization, political economics, development economics and economic history. He has received various grants from the National Science Foundation. His most recent work has been published in the American Economic Review, the Quarterly Journal of Economics, Econometrica, and Theoretical Economics.


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