Dear statalisters:
I would appreciate your comments on the following:
use auto.dta
regress price mpg
(output omitted)
predict resid,res
egen sumres=sum(resid)
sum sumres
Variable | Obs Mean Std. Dev. Min Max
-------------+-----------------------------------------------------
sumres | 74 -.0004654 0 -.0004654 -.0004654
The sum of residuals (which should be zero according to the theory) is
-.0004654. This estimates looks "high" to me.
I run the code above in Gauss and obtained a much lower estimates
(something like 9*10^-10).
Any suggestion to understand the reason for the above discrepancy?
Thank you.
Giovanni
-----------------------------------------------
Giovanni VECCHI
Dipartimento di Economia e Istituzioni
Universit� di Roma "Tor Vergata"
Via Columbia, 2
00133 Roma
Italy
voice + 39 (06) 7259 5730
fax + 39 (06) 2020 500
email [email protected]
-----------------------------------------------
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
