clogit chosen p ta m2 m3 wage12 wage13 wage232 wage233, group(id)
note: m2 dropped because of collinearity
note: m3 dropped because of collinearity
note: wage13 dropped because of collinearity
好像多余的都被drop掉了?
这个该怎么解决呢?
像这样age1=0,1 age2=0,1 age3=0,1 的变量可以设一个age =1,2,3但是属性和连续变量不一样的么?