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Wednesday, December 08, 2021
4:00 PM - 5:00 PM
Baxter Lecture Hall

Ulric B. and Evelyn L. Bray Social Sciences Seminar

Matching and Prices
Ravi Jagadeesan, Postdoctoral Scholar, Department of Economics, Stanford University,

Abstract: Indivisibilities and budget constraints are pervasive features of many matching markets. But when taken together, these features typically cause failures of gross substitutability—a standard condition on preferences imposed in most matching models. To accommodate budget constraints and other income effects, we analyze matching markets under a weaker condition: net substitutability. Although competitive equilibria do not generally exist in our setting, we show that stable outcomes always exist and are efficient. However, standard auction and matching procedures, such as the Deferred Acceptance algorithm and the Cumulative Offer process, do not generally yield stable outcomes. We illustrate how the flexibility of prices is critical for our results. We also discuss how budget constraints and other income effects affect properties of the set of stable outcomes.

Written with Alexander Teytelboym.

For more information, please contact Letty Diaz by phone at 626-395-1255 or by email at letty.diaz@caltech.edu.