* change lower case to upper case in "firm id"
local i = 1998
while `i' <= 2006{
use m`i'.dta, clear
replace id`i'=upper(id`i')
save m`i'.10.dta, replace
local i = `i' + 1
}
local i = 1998
while `i' < 2006{
local j=`i'+1
**step 10: match by firm ID**
工企数据匹配中,Brandt代码中的local i = `i' + 1是什么意思,是错了吗求解答,多谢!还有replace id`i'=upper(id`i')这个命令是什么意思呢?


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