I study optimal contracting where the principal can verify the agent's private information via auditing but cannot contractually commit to audit frequency. Optimal contracting requires sophisticated communication: the agent reports his information to a mediator, who randomly selects a contract. Mediation allows for fine‐tuning the information flow, because the principal observes the selected contract but not the agent's report. Simply offering a menu of contracts is, in general, not optimal. I characterize optimal mediated contracts, determine conditions for when auditing is profitable, and analyze contractual distortions. Mediated contracts can be implemented via negotiated rulemaking procedures, and potentially via sequential communication.

We analyze the problem of a buyer who chooses a supplier for a long-term relationship via an auction. The buyer lacks commitment to not renegotiate the terms of the contract in the long run. Thus, suppliers are cautious about the information revealed during the auction. We show theoretically and experimentally that first-price auctions perform poorly in terms of efficiency and buyer surplus. Suppliers may pool on a high bid to conceal information. Second-price auctions retain their efficient equilibrium and generate substantial surplus for the buyer. We demonstrate that optimal mechanisms require concealing the winning bid with a strictly positive probability.

No abstract

No abstract

No abstract