Thank you Martin.
This link is a good start.
Nick
--- On Thu, 6/18/09, Martin Weiss <[email protected]> wrote:
> From: Martin Weiss <[email protected]>
> Subject: AW: st: AW: lincom
> To: [email protected]
> Date: Thursday, June 18, 2009, 5:59 PM
>
> <>
>
> You want to check out http://www.stata.com/support/faqs/stat/test1.html
> before proceeding...
>
>
> HTH
> Martin
>
>
> -----Ursprüngliche Nachricht-----
> Von: [email protected]
> [mailto:[email protected]]
> Im Auftrag von Nikolaos Pandis
> Gesendet: Donnerstag, 18. Juni 2009 16:53
> An: [email protected]
> Betreff: Re: st: AW: lincom
>
> Dear Martin,
>
> Thank you for the posting. I apologize for being unclear
> and also because I
> am asking very basic questions.
>
> I am not sure I understand the purpose of this command
> after let's say a
> linear regression.
>
> Let's say we have:
>
> xi: regress continvar i.catvar with 3 levels
>
> the regression table will show levels 2 and 3 and
> compare them with the
> reference level 1 of the categorical variable. Why would
> you run the lincom
> command. I am not sure I understand its purpose. Would you
> be able to
> compare level 2 with level 3 with the lincom command?
>
> Regarding the anova post hoc I meant the following:
>
> If I do a one-way ANOVA like below:
>
> oneway continvar catvar, scheffe
>
> I would get the an F-value and p-value which will be
> telling me whether
> there is a sig. difference between any of the category
> levels, whereas the
> -scheffe- option will do the "post hoc"- pairwise
> comparisons between the
> groups 1&2, 1&3 and 2&3 and tell me which
> groups are actually different.
>
> Are the objectives of the lincom command similar the
> scheffe option in the
> above examples? Do I have it all wrong?
>
> Thank you very much.
>
> Nikolaos
> --- On Thu, 6/18/09, Martin Weiss <[email protected]>
> wrote:
>
> > From: Martin Weiss <[email protected]>
> > Subject: st: AW: lincom
> > To: [email protected]
> > Date: Thursday, June 18, 2009, 4:23 PM
> >
> > <>
> >
> > What exactly is a "post hoc" test? Apart from that,
> the
> > help file for
> > -lincom- does a good job under "Description". What
> else do
> > you want to know
> > about the command?
> >
> > Note that -lincom- works after any estimation command,
> so
> > the -regress- case
> > may not be as special as you think...
> >
> >
> >
> > HTH
> > Martin
> >
> > -----Ursprüngliche Nachricht-----
> > Von: [email protected]
> > [mailto:[email protected]]
> > Im Auftrag von Nikolaos Pandis
> > Gesendet: Donnerstag, 18. Juni 2009 14:46
> > An: [email protected]
> > Betreff: st: lincom
> >
> > Hi,
> >
> > I would like to ask if you would possibly direct me to
> a
> > site/article ect
> > that explains in detail the use and meaning of the
> -lincom-
> > command (after
> > -regress-).
> >
> > How is this command related (if it is related) with
> the
> > anova post hoc
> > tests.
> >
> > Thank you very much.
> >
> > Nick
> >
> >
> >
> > *
> > * 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/
> >
> >
> > *
> > * 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/
> >
>
>
>
>
> *
> * 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/
>
>
> *
> * 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/
>
*
* 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/
