It looks like a bug, and I suggest that you send it to Technical
Support. Be sure to show them (and us) what you see if you run:
svydes hhsize, single gen(bad_strat)
-Steve
On Thu, Jan 7, 2010 at 2:33 AM, Michael Begg <[email protected]> wrote:
> Hi,
>
> I am working on a data from a 2 stage survey design with 2 stratum. When I calculate the mean of hhsize, the standard error is missing as shown below.
>
>
> svy: mean hhsize
> (running mean on estimation sample)
>
> Survey: Mean estimation
>
> Number of strata = 2 Number of obs = 5964
> Number of PSUs = 194 Population size = 16041309
> Design df = 192
>
> --------------------------------------------------------------
> | Linearized
> | Mean Std. Err. [95% Conf. Interval]
> -------------+------------------------------------------------
> hhsize | 4.656919 . . .
> --------------------------------------------------------------
> Note: missing standard error because of stratum with single
> sampling unit.
>
>
*
* 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/
