526互联

STKCD

STATA 按STKCD YEAR 合并所有的kamd

use linshi0510,clear bys stkcd year:gen bz=_n local k=_N local aa "" local bb "" local dd "" gen bzz="" format bzz %200s forvalues i=1/`k'{ local aa=s ......
STATA STKCD YEAR kamd
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