2008/11/28 Report No：08-17
Expanding Choice in School Choice
Truthful revelation of preferences has emerged as a desideratum in the design of school choice programs. Gale-Shapley’s deferred acceptance mechanism is strategy-proof for students but limits their ability to communicate their preference intensities. This results in ex-ante inefficiency when ties at school preferences are broken randomly. We propose a variant of deferred acceptance mechanism which allows students to in uence how they are treated in ties. It maintains truthful revelation of ordinal preferences and supports a greater scope of inefficiency.
|キーワード||Gale-Shapley's deferred acceptance algorithm, choice-augmented deferred acceptance, tie breaking, ex ante Pareto efficiency.|