We consider a platform that charges commission rates and subscription fees to sellers and buyers for facilitating transactions but does not directly control the transaction prices, which are determined by the traders. Buyers and sellers are divided into types, and we represent the compatibility...

We explore marketplace design in the context of a B2B platform specializing in liquidation auctions. Even when the platform's aggregate levels of supply and demand remain fixed, we establish that the platform's ability to use its design levers to manage the availability of supply over time...