Would a seller set non-market clearing prices and worry about resale that results from randomization and reduces inefficiency? We show that the optimal mechanism for selling a given quantity of a homogeneous good involves rationing if and only if the revenue function is convex at this quantity....

We consider optimal pricing by a profit-maximizing platform running a dynamic search and matching market. Buyers and sellers enter in cohorts over time, meet and bargain under private information. The optimal centralized mechanism, which involves posting a bid-ask spread, can be decentralized...