GRIPS 政策研究センター Policy Research Center


Nov 28, 2008 Report No:08-17

Expanding Choice in School Choice

  • Atila AbdulkadirogluDepartment of Economics, Duke University
  • Yeon-Koo CheDepartment of Economics, Columbia University
  • Yosuke YasudaGRIPS
Field Economics
Language English

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 efficiency.

Keywords Gale-Shapley's deferred acceptance algorithm, choice-augmented deferred acceptance, tie breaking, ex ante Pareto efficiency.
attachment 08-17.pdf