Thanks for the reply. If I run the suggestion, I get the following:
. svydes hhsize, single gen(bad_strat)
Survey: Describing strata with a single sampling unit in stage 1
pweight: weight
VCE: linearized
Single unit: missing
Strata 1: rural
SU 1: psu
FPC 1: npsu
Strata 2: <one>
SU 2: ssu
FPC 2: nssu
Strata 3: <one>
SU 3: hh
FPC 3: nhh
#Obs with #Obs with #Obs per included Unit
#Units #Units complete missing ----------------------------
Stratum included omitted data data min mean max
-------- -------- -------- -------- -------- -------- -------- --------
-------- -------- -------- -------- -------- -------- -------- --------
0
Cheers
Michael
On 08/01/2010, at 8:22 AM, [email protected] wrote:
> 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.
>>
>>
>
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