Econometrica: Nov, 2017, Volume 85, Issue 6
Avidit Acharya, Juan Ortner
We study a dynamic principal–agent relationship with adverse selection and limited commitment. We show that when the relationship is subject to productivity shocks, the principal may be able to improve her value over time by progressively learning the agent's private information. She may even achieve her first‐best payoff in the long run. The relationship may also exhibit path dependence, with early shocks determining the principal's long‐run value. These findings contrast sharply with the results of the ratchet effect literature, in which the principal persistently obtains low payoffs, giving up substantial informational rents to the agent.
Supplement to "Progressive Learning"
This Online Appendix to the paper titled “Progressive Learning” presents the proof of Lemma 0, an extension of our equilibrium characterization allowing for mixed strategies, an analysis of the full commitment case, and details for Example 4 showing that path dependence can arise when shocks are ergodic.