最新文章专题视频专题关键字专题TAG最新视频文章

相关视频:孩子认字少,可能是错过了阅读敏感期,负责的妈妈一定要看 【 播放不了点此报错 】

我发现育儿话题的阅读量比较少,其它话题的阅读量就比较多,这是怎么回事儿?

Studies based on instrumental variable techniques suggest that the value of a high school education is large for potential dropouts, yet we know much less about the size of the benefit for students who will go on to post-secondary education. To help fill this gap, I measure the value-added of a year of high-school mathematics for university-bound students using a recent Ontario secondary school reform. The subject specificity of this reform makes it possible to identify the benefit of an extra year of mathematics despite the presence of self-selection: one can use subjects unaffected by the reform to control for potential ability differences between control and treatment groups. Further, the richness of the data allows me to generalize the standard difference-in-differences estimator, correcting for heterogeneity in ability measurement across subjects. The estimated value-added to an extra year of mathematics is small for these students – of the order of 17 percent of a standard deviation in university grades. This evidence helps to explain why the literature finds only modest effects of taking more mathematics in high school on wages, the small monetary gain being due to a lack of subject-specific human capital accumulation. Within- and between-sample comparisons also suggest that the extra year of mathematics benefits lowerability students more than higher-ability studentswww.aiyanqing.com防采集请勿采集本网。

写一篇育儿话题的评论,阅读量总不是太多,写一篇其它话题的评论,阅读量轻飘飘上千上万,这是怎么回事?

八卦无效就聊你俩,先聊她的话题,有关她的,她要愿意说就投入话题并表示认同感,然后适当加入你的话题,她有兴趣你俩就可以继续提高温度内容来自www.aiyanqing.com请勿采集。

热门推荐