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Optimal Platform Design

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  • Cole Wittbrodt

Abstract

Search and matching increasingly takes place on online platforms. These platforms have elements of centralized and decentralized matching; platforms can alter the search process for its users, but are unable to eliminate search frictions entirely. I study a model where platforms can change the distribution of potential partners that an agent searches over and characterize search equilibria on platforms. When agents possess private information about their match characteristics and the platform designer acts as a profit maximizing monopolist, I characterize the optimal platform. If match characteristics are complementary and utility is transferable, I show that the solution to this screening problem is efficient, despite the presence of hidden information and market power. Matching under the optimal platform is perfectly assortative -- there is no equilibrium mismatch.

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  • Cole Wittbrodt, 2025. "Optimal Platform Design," Papers 2505.00205, arXiv.org.
    • Handle: RePEc:arx:papers:2505.00205
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    File URL: http://arxiv.org/pdf/2505.00205
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