请问做安慰剂检验(代码如下),显示file .dta not found,该怎么解决啊? 2 个回复 - 928 次查看
clear
mat b = J(500,1,0)
mat se = J(500,1,0)
mat p = J(500,1,0)
forvalues i=1/500{
use "数据.dta" , clear
xtset city year
keep if year==2006
sample 71, count
...2022-10-27 14:47 - wgkswzzz - Stata专版