怎么在stata中改变虚拟变量基准组?

2025-04-13 03:32:10
推荐回答(1个)
回答1:

同下面的例子类似:
sysuse auto, clear
xi: reg price i.rep78 weight length //系统默认rep78=1为基准组
char rep78[omit] 3 //这里设置rep78=3为基准组
xi: reg price i.rep78 weight length