搜索结果: 1-1 共查到“法学 wasting”相关记录1条 . 查询时间(0.095 秒)
Are We Wasting Our Children's Time by Giving Them More Homework?
first differencing homework instrumental variable selection bias unobserved traits
2012/10/31
Following an identification strategy that allows us to largely eliminate unobserved student and teacher traits, we examine the effect of homework on math, science, English and history test scores for ...