Incentive auctions and information revelation

We study an incentive auction in which multiple principals bid for the excl usive services, or effort, of a single agent. Each principal has private in formation about her valuation for these services, and the agent has private information about his disutility of providing them. We characterize the eq uilibrium of this auction and examine the agent's incentives to reveal info rmation about his type. We show that the effort level taken by the agent is smaller than in the standard auction for a known agent type and greater th an in the single-principal, single-agent model.