In the Indian state of West Bengal, potato farmers sell to local middlemen because they lack direct access to wholesale markets. In high-frequency farmer marketing surveys we find that farmers are poorly informed about wholesale and retail prices, and there is a large gap between wholesale and...

We study mediated many-to-many matching in markets in which valuations evolve over time as the result of shocks, learning through experimentation, or a preference for variety. The analysis uncovers the key tradeoffs that platforms face in the design of their matching protocols. It shows that the...