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Created page with "=matchingLBO.do= This do file aims to match companies with the closest propensity score based on industry, year, and number of patents from STATApredictLBO.dta. ==Oct 18== us..."
=matchingLBO.do=
This do file aims to match companies with the closest propensity score based on industry, year, and number of patents from STATApredictLBO.dta.
==Oct 18==
use STATApredictLBO.dta, clear
/*rename industrygroup3 case_industrygroup3
rename year case_year*/
rename nopatents case_nopatents
rename logitpw case_logitpw
rename gvkey case_gvkey
/*industry, year, and no. of patents*/
joinby industrygroup3 year using STATApredictLBO.dta
gen a = nopatents*0.95
gen b = nopatents*1.05
gen delta=abs(logitpw-case_logitpw)
drop if case_nopatents > b | case_nopatents < a
// GENERATE SOME RANDOM NUMBERS TO RANDOMLY BREAK ANY TIES
// ON CLOSENESS OF MATCH OF MARKET VALUE
set seed 1020
gen double shuffle1 = runiform()
gen double shuffle2 = runiform()
by case_gvkey (delta shuffle1 shuffle2), sort: keep if _n == 1
drop delta shuffle1 shuffle2
( )Error op. sys. refuses to provide memory
This do file aims to match companies with the closest propensity score based on industry, year, and number of patents from STATApredictLBO.dta.
==Oct 18==
use STATApredictLBO.dta, clear
/*rename industrygroup3 case_industrygroup3
rename year case_year*/
rename nopatents case_nopatents
rename logitpw case_logitpw
rename gvkey case_gvkey
/*industry, year, and no. of patents*/
joinby industrygroup3 year using STATApredictLBO.dta
gen a = nopatents*0.95
gen b = nopatents*1.05
gen delta=abs(logitpw-case_logitpw)
drop if case_nopatents > b | case_nopatents < a
// GENERATE SOME RANDOM NUMBERS TO RANDOMLY BREAK ANY TIES
// ON CLOSENESS OF MATCH OF MARKET VALUE
set seed 1020
gen double shuffle1 = runiform()
gen double shuffle2 = runiform()
by case_gvkey (delta shuffle1 shuffle2), sort: keep if _n == 1
drop delta shuffle1 shuffle2
( )Error op. sys. refuses to provide memory
