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st: RE: Match treated to not-treated firms
From
"Radwin, David" <[email protected]>
To
<[email protected]>
Subject
st: RE: Match treated to not-treated firms
Date
Thu, 20 Mar 2014 15:46:12 -0400
You might be able to do this with -psmatch2- (Leuven & Sianesi, SSC),
using the option -neighbor(5)- and following the instructions in the
help under the heading "Matching within strata" to group by year,
industry, and size.
David
--
David Radwin, Senior Research Associate
Education and Workforce Development
RTI International
2150 Shattuck Ave. Suite 800, Berkeley, CA 94704
Phone: 510-665-8274
www.rti.org/education
> -----Original Message-----
> From: [email protected] [mailto:owner-
> [email protected]] On Behalf Of Laura-Sophie Henning
> Sent: Thursday, March 20, 2014 5:13 AM
> To: [email protected]
> Subject: st: Match treated to not-treated firms
>
> Dear all,
> I want to identify matches for a set of treated firms and am not sure
> which matching command allows best to incorporate my matching
criteria.
> My sample includes 300 treated and 25,000 not-treated firms. The
binary
> variable "treated" (either 0 or 1) indicates treatment. The sample
spans
> the years 2000-2011, across all 2-digit SIC codes.
> For each treated firm, I would like to find 5 non-treated matches
(with
> replacement). I would want non-treated matches to be in the same year,
2-
> digit SIC industry, and size quintile (total assets), and to have the
> smallest possible absolute difference in terms of book-to-market
ratio.
> I had a look at cem, nmatch and mahapick but did not find a way to
account
> for all these criteria. Can somebody help? Thanks in advance!
> Kind regards,
> Laura Sophie Henning
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