I am currently doing my thesis and I am struggling with this problem.
I have a panel dataset in which law (dummy variable) is the identification between treatment group and control group. I want to do a matching with replacement based on size and SIC code. Specifically, I want to match by firm size in a range of 50%, in the same 2-digit SIC industry and same year. If there is no proper match in the same 2-digit industry, I want to match it with the one the same 1-digit industry
This is an example of my dataset.
Code:
* Example generated by -dataex-. To install: ssc install dataex clear input long gvkey int fyear str1 sic1 str2 sic2 double at byte law 12622 1992 "3" "38" 100.19 0 12622 1993 "3" "38" 89.988 0 12622 1994 "3" "38" 89.778 0 14453 1992 "7" "73" 9.335 0 14453 1993 "7" "73" 14.157 1 14453 1994 "7" "73" 25.009 0 14453 1995 "7" "73" 46.685 0 14453 1996 "7" "73" 86.294 0 11907 1992 "3" "36" 5.833 1 11907 1993 "3" "36" 11.169 0 11907 1994 "3" "36" 9.79 0 11907 1995 "3" "36" 17.668 0 11907 1996 "3" "36" 13.482 1 11907 1997 "3" "36" 12.24 0 11907 1998 "3" "36" 10.279 0 11907 1999 "3" "36" 14.124 0 4641 1992 "3" "38" 1113.055 0 4641 1993 "3" "38" 998.403 0 4641 1994 "3" "38" 644.464 0 4641 1995 "3" "38" 367.479 0 end
I really appreciate if you could help me.
Thank you.
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