Nick,
Thanks for that. My reasoning behind using -if- was to get round the
problem of -xtpcse- failing to run because of missings, which was what
appeared to be happening. When I replaced them with zeros, it ran, but I'm
uncomfortable with the potential consequences of making those changes, for
the reasons I gave earlier.
C.
> I see no limitation on the use of -if- with -xtpcse-.
>
> If your syntax here is a guide to what you typed,
> the comma in front of -if- is incorrect.
>
> Or it may be that your way of spelling out
>
> if [13 indvars] ! .
>
> was incorrect.
>
> But in any case a condition of that form
> is redundant with almost all
> estimation commands. Stata automatically
> ignores observations with values missing
> on the covariates (independent variables,
> if you will).
>
> Nick
> [email protected]
>
> Clive Nicholas
>
>> I've tried to get round this by using -if- to take out
>> cases with missings
>> on key variables using OLS-PCSE models. I tested this using
>> just two Xs,
>> and it ran. But when trying the full model:
>>
>> -xtpcse [depvar] [50 indvars], if [13 indvars]!=.-,
>>
>> it returns an error saying that -if- isn't allowed!
> *
> * 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/
>
Yours,
CLIVE NICHOLAS,
Politics Building,
School of Geography, Politics and Sociology,
University of Newcastle-upon-Tyne,
Newcastle-upon-Tyne,
NE1 7RU,
United Kingdom.
*
* 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/
