工具变量(2SLS)介绍 使用OLS还是工具变量?——豪斯曼检验
H0:所有变量均为外生
reg y x1 x2
estimates store ols
ivregress 2sls y x1 (x2z1 z2) 怀疑x2为内生变量
estimates store iv
hausman iv ols,constant sigmamore对于…
Do you have folders filled with myriad of files that need a serious spring cleaning ? If you do, we have Cruftbuster, an automated self-cleaning tool for Linux, to sort out your messy folders. 您的文件夹中是否装有无数需要认真Spring清洁的文件? 如…