Sorting and Grading
研究了如何对能力不同的学生进行最优分班和评分，发现最优体系是能力分层粗放、顶尖学校评分更宽松，为中学分轨制政策辩论提供参考。
Abstract We propose a framework to assess how to optimally sort and grade students of heterogeneous ability. Potential employers face uncertainty regarding an individual’s productive value. Knowing which school an individual went to is useful for two reasons: firstly, average students’ ability may differ across schools; secondly, different schools may use different grading rules and thus provide varying incentives to exert effort. An optimal school system exhibits coarse stratification with respect to ability, and more lenient grading at the top-tier schools than at the bottom-tier schools. Our paper contributes to the ongoing policy debate on tracking in secondary schools.