Teacher turnover: Effects, mechanisms and organisational responses
利用英格兰行政数据，研究发现教师流入率对学生成绩有微小但显著的负面影响，主要机制是新教师缺乏学校特定人力资本，学校通过将新教师调离高风险年级来缓解影响。
This paper contributes to the understanding of the causal relationship between teacher turnover and student performance. We extend this research by examining the mechanisms through which turnover affects student learning, and by providing evidence on how schools respond to mitigate the disruptive effects of turnover. Using administrative data covering all state-school, age-16 students and their teachers in England, we find that a higher teacher entry rate has a small but significant negative effect on students’ final qualifications from compulsory-age schooling. This is the first study to document that the lack of school-specific human capital in incoming teachers is the main mechanism through which turnover disrupts student performance. We also find evidence that schools mitigate the effects of turnover by assigning new teachers away from high-risk student grades.