Hi Martin,
thanks for your reply!
I don't understand, however, how I can use the ttest with regressions
with more than one continuous independent variables?
Regards,
Ida
Zitat von Martin Weiss <[email protected]>:
<>
Why don`t you take your cue from official Stata?
**************
webuse fuel3, clear
ttest mpg, by(treated)
reg mpg treated
te treated
**************
HTH
Martin
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of
[email protected]
Sent: Mittwoch, 30. September 2009 19:05
To: [email protected]
Subject: st: one-sided p-value using test x1=x2
Hello all,
can anyone help me how to calculate the one-sided p-value of a F-test
testing coefficients from panel regressions? (test x1=x2)
For example, I would like to test whether beta1<beta2 and not
beta1=beta2. Is it correct when I just divide the p-value by 2 when
testing beta1-beta2>0 and calculate (1-p-value/2) when testing
beta1-beta2<0? Does anything change when both coefficients are
negative? Do I need to take absolute values?
Sorry for bothering you with this rather simple question, but I was
not sure whether the FAQ contribution to one-sided tests
(http://www.stata.com/support/faqs/stat/oneside.html) applies to my
case, as I want to test the difference between two coefficients (and
not whether a coefficient is smaller or larger than zero or another
number).
Any help would be highly appreciated!
Regards, Ida
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