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Re: st: Unable to create local macro in modified ado-file (xtreg_fe.ado)

From   Richard Williams <>
Subject   Re: st: Unable to create local macro in modified ado-file (xtreg_fe.ado)
Date   Tue, 17 Jan 2012 10:19:52 -0500

At 09:47 AM 1/17/2012, Nick Cox wrote:
3. Although there can be exceptions I don't think user-programmers are
well advised to take Stata's own files and modify them. The exceptions
are when you can understand everything you are modifying and the
consequences of so doing. This in turn raises several distinct issues
but I will stick to the most positive: You will best understand what
you create for yourself. (Writing wrappers for Stata's own files is in
contrast usually a very good strategy.)

For me it is more of an issue when looking at old user-written commands. Stata keeps its commands working and updated from one version of Stata to the next. But, there are user-written commands that never get updated and hence don't take advantage of Stata's new features. For example, writing gologit2 was a bit of a challenge because the original gologit was written for version 5 and I didn't have documentation for many of the commands used.

As for me, I have Stata 7 through 12 on my machine. Not because I have any great desire to use Stata 7 (indeed, it looks awful now, although it seemed great at the time) but because access to the help files is sometimes handy.

Richard Williams, Notre Dame Dept of Sociology
OFFICE: (574)631-6668, (574)631-6463
HOME:   (574)289-5227
EMAIL:  Richard.A.Williams.5@ND.Edu

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