Efficiency and Stability in Large Matching Markets
83 Pages Posted: 1 Aug 2015
Date Written: July 30, 2015
We study efficient and stable mechanisms in matching markets when the number of agents is large and individuals’ preferences and priorities are drawn randomly. When agents’ preferences are uncorrelated, then both efficiency and stability can be achieved in an asymptotic sense via standard mechanisms such as deferred acceptance and top trading cycles. When agents’ preferences are correlated over objects, however, these mechanisms are either inefficient or unstable even in an asymptotic sense. We propose a variant of deferred acceptance that is asymptotically efficient, asymptotically stable and asymptotically incentive compatible. This new mechanism performs well in a counterfactual calibration based on New York City school choice data.
Keywords: Large matching markets, Pareto efficiency, Stability, Fairness, Payoff equivalence, Asymptotic efficiency, and Asymptotic stability
JEL Classification: C70, D47, D61, D63
Suggested Citation: Suggested Citation