做二值因变量回归后,有一段程序,请帮忙把各个步骤解释一下。还有最终得到的是什么?
probit y x1 x2 x3 x4(注:这里x1 x2是连续变量, x3 x4是虚拟变量)
predict xb if e(sample),xb
predict p if e(sample),p
local cont "x1,x2"
local dummies "x3 x4"
gen t_var=normalden(xb)
foreach c of local cont{
gen pe_'c'=t_var*_b['c']
}
foreach d of local dummies{
gen pe_'d'=p-norm(xb-_b['d'])
replace pe_'d'=norm(xb+_b['d'])-p if 'd'==0
}
summ ‘cont’ 'dummies' ,detail [注:最后这一步回归出现错误提示,不知道‘cont’ 'dummies' 代表什么意思]


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