Changes

use STATApredictLBO.dta, clear \\<br>rename nopatents case_nopatents \\<br>rename logitpw case_logitpw \\<br>rename gvkey case_gvkey \\<br>

/*industry, year, and no. of patents*/<br>joinby industrygroup3 year using STATApredictLBO.dta<br>gen a = nopatents*0.95<br>gen b = nopatents*1.05 <br>gen delta=abs(logitpw-case_logitpw)<br>drop if case_nopatents > b | case_nopatents < a <br>

// GENERATE SOME RANDOM NUMBERS TO RANDOMLY BREAK ANY TIES<br>// ON CLOSENESS OF MATCH OF MARKET VALUE <br>set seed 10200.5 <br>gen double shuffle1 = runiform() <br>gen double shuffle2 = runiform() <br>

by case_gvkey (delta shuffle1 shuffle2), sort: keep if _n == 1 <br>drop delta shuffle1 shuffle2 <br>

( ) Error op. sys. refuses to provide memory ==Attempt 2==foreach x of varlish matchfilter{ if x==1{ foreach matchfilter[_n]==0{ if year[_n]==year[_x] & industrygroup3[_n]==industrygroup3[_x]{ if nopatents[_n]/nopatents[_x]<1.1 | nopatents[_n]/nopatents[_x]>1/1.1{ gen delta=abs(logitpw[_n]-logitpw[_x] m=gvkey[_min(delta)]} } } }  Error invalid syntax Possible reasons: 1. use of _n and x 2. if loop