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Re: st: outreg- including Heckman estimation results
From
John Luke Gallup <[email protected]>
To
[email protected]
Subject
Re: st: outreg- including Heckman estimation results
Date
Sat, 2 Mar 2013 23:02:40 -0800
Suryadipta,
You have found a bug, which only occurs when you use the -keep- option of -outreg- in a multi-equation estimation (like -heckman-) and then use the -eq_merge- option. I had never tried this combination before.
Until I fix the underlying bug, you can get around the problem by changing -keep(var1 var2 var3)- in the -heckman- command to -keep(ln_var:var1 var2 var3 depvar:var1 var2 var3)-.
John
On Mar 1, 2013, at 3:37 PM, Suryadipta Roy <[email protected]> wrote:
> Dear Statalisters,
>
> I am using -outreg- to create estimation tables of my regressions.
> However, there seems to be a huge proliferation of columns following
> -heckman- , and I was wondering if someone can help with getting it
> right. My commands are as follows:
>
> tobit ln_var `controls', ll(0) vce(cluster pair)
>
> outreg using mytables, bdec(2) squarebrack keep(var1 var2 var3)
> starlevels(10 5 1) sigsymbols(+,*,**) summstat(N \ r2_p) summtitle(#
> of observations \ Pseudo R-squared) ctitle("", Tobit model)
> note(Cluster robust standard errors in brackets) merge /* this creates
> the first column with the tobit regression results */
>
> probit depvar `controls' selection_var , vce(cluster pair)
>
> outreg using mytables, bdec(2) squarebrack keep(var1 var2 var3)
> starlevels(10 5 1) sigsymbols(+,*,**) summstat(N \ r2_p) summtitle(#
> of observations \ Pseudo R-squared) ///
> ctitle("", Probit model) merge replace /* this creates the second
> column with the probit regression results followed by */
>
> reg ln_var `controls' if depvar==1, vce(cluster pair)
>
> outreg using mytables, bdec(2) squarebrack keep(var1 var2 var3)
> starlevels(10 5 1) sigsymbols(+,*,**) summstat(N \ r2_a) summtitle(#
> of observations \ Adjusted R-squared) ///
> ctitle("", Two-part lognormal model) merge replace /* this creates the
> third column with the lognornam regression results of the two-part
> model*/
>
> However, the problem arises when I run -heckman- next and tries to
> creates two columns of results for the outcome and the selection
> variables.
>
> heckman ln_depvar `controls' , select(depvar = `controls'
> selection_var ) twopart
> /* using outreg to add two columns */
> outreg using mytables, bdec(2) eq_merge squarebrack keep(var1 var2
> var3) starlevels(10 5 1) sigsymbols(+,*,**) summstat(N, N) summtitle(#
> of observations) ctitles("", Heckman Outcome equation, Heckman
> Selection equation) merge replace
>
> I believe that there is a mistake in the last command, and I would
> very much appreciate some suggestions in this regard.
>
> Sincerely,
> Suryadipta.
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