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st: AW: question
<>
You can always have -display- show the relevant estimates, but you won`t get
a standard error then:
*************
sysuse auto, clear
reg mpg weight length
di exp(_b[_cons]+_b[length]*15.3) /*
*/ *exp(e(rss)/e(df_r)/2)
*************
HTH
Martin
-----Ursprüngliche Nachricht-----
Von: [email protected]
[mailto:[email protected]] Im Auftrag von Tunga Kantarci
Gesendet: Dienstag, 3. November 2009 14:38
An: [email protected]
Betreff: st: question
Hello,
I wish to calculate a figure where I call coefficient estimates and
residuals sum of squares and degrees of freedom. All these quantities are
from the stata estimation output. When I run the relevant command "nlcom
exp(_b[_cons]+_b[income]*15.3)*exp(e(rss)/e(df_r)/2)" I get the error "could
not calculate numerical derivative". This is perhaps because e(rss) and
e(df_r) are not estimates. (As Maarten pointed out yesterday actually)
1. Does this mean that in the nlcom command I am only allowed to specify
coefficient estimates?
2. How can I achieve what I want to achieve: I wish to call figures into the
stated command I am running.
Thanks in advance.
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* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/