Hi Nick,
Thanks for you reply and information, i did checked my variables and
are not strings... probably the missing values could be the answer...
anyway i have been read that autocorrelation test with xtserial should
be used with panel data with a large number of data, could be this in
relation with my problem ( i have only 386 samples)
Regards
Rodrigo
2013/4/8 Nick Cox <njcoxstata@gmail.com>:
> This typically means that
>
> either some variable you think is numeric is really string
>
> or some variable contains missing values, prohibiting some calculation.
>
> We can't say more without knowing more about your data.
>
> Nick
> njcoxstata@gmail.com
>
>
> On 8 April 2013 13:52, Rodrigo Badilla <rodrigo.badilla@gmail.com> wrote:
>
>> I am triying to run a autocorrelation tests with xtserial command,
>> lamentably only get this error output: "no observations" previously i
>> set my data with xtset command, my data set have 386 samples.
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