- gen gongzi=0
- forvalue i=1/30{
- if(gongzi_max [`i']!=.&gongzi_min[`i']!=.){
- replace gongzi=(gongzi_max in `i' + gongzi_min in `i')/2
- }
- else if(gongzi_max [`i']!=.&gongzi_min[`i']==.){
- replace gongzi= gongzi_max in `i'
- }
- else if(gongzi_max [`i']==.&gongzi_min[`i']!=.){
- replace gongzi= gongzi_min in `i'
- }
- }


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