Difference between revisions of "MatchingLBO.do"
Yimengtang (talk | contribs) (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...") |
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Revision as of 11:12, 18 October 2016
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
