之前使用ivreghdfe进行工具变量法时,总是提示last estimates not found,无奈之下只能使用ivreg2和xtivreg,可是在虚拟变量很多的情况下,这些命令用起来很复杂。 今天终于解决了这个问题! 错误方法:自动下载 首先声明,使用常规方法在stata里面直接下载ivreghdfe及其附带的安装包,都不可用❌ net install ftools net instal...
So, I think his cautions and concerns are pretty valid; robust standard errors are not a panacea for a model that is "seriously in error" . But, it still seems to leave open the question of whether always using robust would be a good idea if your model is "nearly correct" or hetero ...
1. They provide inference when your estimator is not defined through maximization. Examples are: instrumental variables methods (very wide in econometrics, and restricted to a couple of Ken Bollen's papers in social sciences), two-stage estimation (see a discussion a couple of weeks ago on Murp...
To examine whether the widely used Strengths and Difficulties Questionnaire (SDQ) can validly be used to compare the prevalence of child mental health prob