egen ind_year = group(id year), label lname(ind_year)
sum ind_year
drop CFOM
gen CFOM =.
forv i = 1(1)`r(max)'{
qui reg CFO ta sale dsale ldsale ttc eec ooc if (ind_year==`i')
qui predict e if e(sample), r
qui replace CFOM = e if e(sample)
drop e
}


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