Financial Incentives and Student Achievement: Evidence from Randomized Trials *
通过达拉斯、纽约和芝加哥三城市超200所学校的实地实验，发现经济激励对学生成绩的总体影响在统计上为零，仅达拉斯的英语学生有显著效果，并讨论了城市间差异的可能原因。
This article describes a series of school-based field experiments in over 200 urban schools across three cities designed to better understand the impact of financial incentives on student achievement. In Dallas, students were paid to read books. In New York, students were rewarded for performance on interim assessments. In Chicago, students were paid for classroom grades. I estimate that the impact of financial incentives on student achievement is statistically 0, in each city. Due to a lack of power, however, I cannot rule out the possibility of effect sizes that would have positive returns on investment. The only statistically significant effect is on English-speaking students in Dallas. The article concludes with a speculative discussion of what might account for intercity differences in estimated treatment effects. Copyright 2011, Oxford University Press.