如何在Stata中同时估算两个变量

Question

我试图在Stata中同时估算两个变量：比如y和x。然后我想对它们进行线性回归。

我使用的代码是：

mi set mlong
mi register imputed y x
mi impute regress y a b c, add(10)
mi impute regress x a b c, add(10)
mi estimate: regress y x

我遇到了一个错误："估计样本在m=1和m=11之间变化"。有人能帮我吗？谢谢

Answer 1

我更喜欢使用链式方程。下面的代码应该可以工作（注意，第1部分可以跳过，因为我只使用它来生成合适的模拟数据集）：

* Part 1
clear all
set seed 0945 
set obs 50
gen y0 = _n 
gen y = runiform()
sort y
gen x0 = _n
gen x = runiform()
sort x
replace y = . in 1
replace y = . in 5
replace y = . in 10
replace y = . in 15
replace y = . in 20
replace y = . in 25
replace y = . in 30
replace y = . in 35
replace y = . in 40
replace y = . in 45
replace y = . in 50
sort y
replace x = . in 1
replace x = . in 5
replace x = . in 10
replace x = . in 15
replace x = . in 20
replace x = . in 25
replace x = . in 30
replace x = . in 35
replace x = . in 40
replace x = . in 45
replace x = . in 50
gen a = _n 
sort x
gen b = _n 
gen c = _n 
* Part 2
mi set mlong
mi register imputed y x
mi impute chained (regress) y x = a b c, add(10)
mi estimate, dots: regress y x