Thanks a lot May. I've been able to test the significance using the dummies
and regress (xi).
Daniel
May Boggess
<[email protected]> To: [email protected]
Sent by: cc:
owner-statalist@hsphsun2. Subject: Re: st: Equality of means and pweights
harvard.edu
08/07/2003 05:01 p.m.
Please respond to
statalist
Daniel,
I am not sure what you mean when you say the dependent
variable is ordinal AND continuous,
so I am just going to assume it's a continuous numerical variable.
I'll be calling this variable y.
I'll call the independent variable x, which I'll assume
is numerical, but discrete (discrete because I am supposing
you want to test the means of y over the levels of the factor x).
I'll also suppose the pweights are in a variable called p.
To keep the observations between the first and forth quartile
then drop the observations you don't need by doing:
summarize y, detail
drop if y > r(p75)
drop if y < r(p25)
(By changing y to x in these lines of code you will
drop the observations that are between the first and forth quartile
of your independent variable x.)
To do an equality of means I am supposing you want an
ANOVA table, and (as you know) Stata's -anova- doesn't have a
pweight option. So, here is something you could try.
svyset [pweight=p]
will tell Stata that p is the variable with your pweights in there.
xi: svyregress y i.x
will do the regression. Then use -test- to get it to tell
you the significance of x:
test _Ix_1 _Ix_2
(this list should contain all the dummy variables created for x)
hope this is some help,
May Boggess
On Fri, 2003-07-04 at 16:43, DANIEL CARO wrote:
> Dear Statalisters,
>
> I'm trying to test the equality of means of a dependent variable
(ordinal
> and continuous) between the first and fourth quartile of an independent
> variable (in quartiles). Do you know of any command to perform this
test
> that can handle pweights?
>
> Thanks a lot for your help,
>
> Daniel
>
>
>
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