The iterative deferred acceptance mechanism

Lately, there has been an increase in the use of sequential mechanisms, instead traditional direct counterparts, college admissions many countries, including Germany, Brazil, and China. We describe these mechanisms identify their shortcomings terms incentives outcome properties. introduce a new mechanism, which improves upon shortcomings. Unlike ask students for full preference ranking over colleges, our mechanism asks to sequentially make choices or submit partial rankings from sets colleges. These are used produce tentative allocation at each step. If some point it is determined that student can no longer be accepted into previous choice, then she asked another choice among colleges would tentatively accept her. Participants following simple strategy choosing most-preferred step ex-post equilibrium yields Student-Optimal Stable Matching.