cd "D:\SUNBOW"
forv i=2001/2014 {
clear
insheet using `i'indegree.csv
save `i'indegree.dta, replace
}
***append
clear
use 2000indegree.dta, clear
forv i=2001/2014 {
append using `i'indegree.dta
}
save indegree2000-2014.dta, replace
***merge
***merge前对变量名重命名
clear
use 2000indegree.dta, clear
rename x indegree2000
save 2000indegree.dta,replace
clear
forv i=2001/2014 {
use `i'indegree.dta
rename x indegree`i'
save `i'indegree.dta,replace
}
***merge
clear
use 2000indegree.dta, clear
forv i=2001/2014 {
merge 1:1 v1 using `i'indegree.dta
drop _merge
}
save 2000-2014indegreemerged.dta, replace
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