Abstract
We consider platform competition in a two-sided market, where the two sides (buyers and sellers) have ex ante uncertainty and ex post asymmetric information concerning the value of a new technology. We find that platform competition may lead to a market failure: competition may result in a lower level of trade and lower welfare than a monopoly, if the difference in the degree of asymmetric information between the two sides is below a certain threshold. Multi-homing solves the market failure resulting from asymmetric information. However, if platforms can impose exclusive dealing, then they will do so, which results in market inefficiency. (JEL D41, D42, D82, D83, L11, L12)
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