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st: Estout results of two SURs with the same regressors


From   Francesco Scervini <[email protected]>
To   <[email protected]>
Subject   st: Estout results of two SURs with the same regressors
Date   Tue, 18 Mar 2014 14:57:43 +0100

Dear Statalisters,

I make two SURs using -sureg-.
The dependent variables are pre-tax prices of goods 1 and 2 in the first SUR and post-tax prices of goods 1 and 2 in the second SUR. Independent variables are the same in both SURs and both equations (see the example hereafter).

When I -estout- the results, something strange (to me) occurs: results from the first equations of the SURs are shown in the same lines (as I expected, since regressors are the same), while results from the second equations are shown in different lines (that puzzles me).

Here is a minimum working example (with meaningless variables):

sysuse nlswide1, clear
sureg (wage68 count68 collgrad68) (hours68 count68 collgrad68)
est store sur1
sureg (wage88 count68 collgrad68) (hours88 count68 collgrad68)
est store sur2
estout sur1 sur2, eqlabels("Wage" "Hours") mlabels("dep:1968" "dep:1988")

that produces the following table:

--------------------------------------
                 dep:1968     dep:1988
                        b            b
--------------------------------------
Wage
count68          .0011111    -.0028053
collgrad68       3.639574     4.791805
_cons            3.893202      7.59611
--------------------------------------
Hours
count68           .005314
collgrad68       7.156666
_cons            34.93033
--------------------------------------
hours88
count68                      -.0006587
collgrad68                    7.299064
_cons                         35.65841
--------------------------------------


I am using Stata 12.1 on MacOS X and -estout- version 3.13

Any ideas?

Thanks
--
Francesco Scervini
francescoscerviniphd.wordpress.com

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