Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: st: xtdpdsys/xtabond2 and xtdpd command Question
From
Nick Cox <[email protected]>
To
[email protected]
Subject
Re: st: xtdpdsys/xtabond2 and xtdpd command Question
Date
Wed, 9 May 2012 22:04:54 +0100
OK, but my second point was to -summarize- on the same variables.
The -cmdname- convention, explained in the FAQ, is that -cmdname-
means the Stata command with that name.
The commands you are trying are presumably rejecting your data because
of either (a) string variables or (b) missing values. So -summarize-
is a way of trying to find out what is going on. -summarize- on a
string variable shows 0 observations. Missing values on a numeric
variable will show up as a reduced number of non-missing values.
On Wed, May 9, 2012 at 9:58 PM, Rituparna Basu <[email protected]> wrote:
> Sorry about that Nick.
>
> The panel data set that I have, has 467 groups with 27 months as mean length of follow-up. The variable, say 'x', I am referring to is continuous and is dynamic/ autoregressive in nature. So I tried the dynamic panel models.
> Xtabond did not seem to work may be because the dataset is unbalanced in nature. Next, I tried xtdpdsys and xtdpd model, but they said 'no observations'. I believe, I am going wrong in specifying the model.
>
> I am interested in running a model that uses at least two lags of the variable. Currently, I have no independent variables. Let me know if more clarification is needed.
>
> RB
>
> -----Original Message-----
> From: [email protected] [mailto:[email protected]] On Behalf Of Nick Cox
> Sent: Wednesday, May 09, 2012 1:28 PM
> To: [email protected]
> Subject: Re: st: xtdpdsys/xtabond2 and xtdpd command Question
>
> Try _not shouting please_ and -summarize- on the same variables.
>
> Nick
>
> On Wed, May 9, 2012 at 8:27 PM, Rituparna Basu <[email protected]> wrote:
>
>> I have an unbalanced panel data in which I am trying to run the 'xtdpdsys' and 'xtdpd' commands. But it gives me error saying NO OBSERVATIONS. I am not sure where I am going wrong. Currently, I am running an INTERCEPT only model.
*
* 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/