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Nathan Hancart

Publications and source records attributed to Nathan Hancart.

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Selection Procedures in Competitive Admission

I study how organisations choose selection procedures in a competitive environment. Two firms compete to hire candidates of unknown productivity from a common pool. Firms simultaneously post a selection procedure which consists of a test and an acceptance probability for each test outcome. After observing the firms' selection procedures, each candidate can apply to one of them. Firms can vary both the accuracy and difficulty of their test. The firms face two key considerations when choosing their selection procedure: the statistical properties of their test and the selection into the procedure by the candidates. I show that there is a unique symmetric equilibrium where the test is maximally accurate but minimally difficult. Intuitively, competition leads to maximal but misguided learning: firms end up having precise knowledge that is not payoff-relevant. In contrast, when firms face capacity constraints or have the possibility of making a wage offer, they use more difficult tests in equilibrium. I also consider asymmetric equilibria where one firm is more selective than another.

econ.TH

The (No) Value of Commitment

I provide a sufficient condition under which a principal does not benefit from committing to a mechanism in economic models represented by a maximisation problem under constraints. These problems include mechanism design, principal-agent models or sender-receiver games. In principal-agent problems, this condition holds if the agent has a finite strategy space and the principal's value function is continuous in the mechanism.

econ.TH

Simple Communication

We study multidimensional cheap talk with simple language and aligned preferences. An expert communicates with a decision-maker using a score that aggregates a multidimensional state into a one-dimensional message. Even though the expert and the decision-maker share the same payoffs, the use of simple language introduces strategic frictions. Under quadratic-loss utility, any equilibrium score must be linear in the state or a coarsening of a linear score. As a result, equilibrium payoffs are lower than those achievable under commitment to a score. Finally, for normally distributed states, we characterize the equilibrium linear scores and show they correspond to the ex-ante best and worst linear scores.

econ.TH