husbandliminle 发表于 2009-10-22 16:03
兄弟姐妹们，帮个忙，我做黑克曼的两步法，想要得到米尔斯比率的估计值，          写了命令
heckman  hourwage [experience education tennur exp2 ten2 hu1 gen1 con1 own1 own2[aweight=experience] ,selectpro1=education marri1 age age2 hu1 gen1 con1 own1 own2)[twostep]  predict newvarname [statistics mills nonselection hazard]
但是结果老显示说不知道experience的weight type ,命令里我已经定义了啊，为什么还说不知道，是我的命令有问题还是数据有问题？请大家指点指点啊，急！

husbandliminle 发表于 2009-10-23 20:08 好的！全部命令是这样的：

heckman hourwage [experience education tennur exp2 ten2 hu1 gen1 con1 own1 own2] [aweight=experience] ,select （pro1=education marri1 age age2 hu1 gen1 con1 own1 own2) [twostep] predict newvarname [statistics mills nonselection hazard]