917968079 发表于 2021-10-7 10:38 
问题描述清楚,你的数据结构是什么样的
<br>
. label values PROV2018 .
. gen province=0
. replace province=1 if PROV2018 ==11|12|13|14|15|21|22|23|32|33|34|35|36|37|41|42|43|44|45|50|51|52 |53|61|62|64<br>
(7,781 real changes made)
. xi:reg ln_Landeff Non_agr Tdmj Labor Mjjx Female Age Edu Daikuan Eco Fuwu Dixing Weizhi i.province<br>
i.province _Iprovince_1-1 (naturally coded; _Iprovince_1 omitted)