Re: st: -svyset- parameters for survey with multiple waves

[Mohamad Mahmoud <ksgksg@gmail.com>]

Hi,
I'd appreciate your insight on this, specifically on how to set up a
survey with multiple waves.
thanks,
Mohamad

On Mon, Nov 4, 2013 at 1:40 PM, ksgksg <ksgksg@gmail.com> wrote:
> Hi,
> I am working with a Gallup survey conducted across 20 countries ("wp5"
> is the country identification variable ), each country was sampled in
> 7 independent waves, that is respondents in each wave are different.
> The survey has around 1000 respondents per country per wave. Each
> respondent is assigned two weights, 1) "wgt" is a within sample weight
> that adds up to the 1000 per wave. 2) "projwt" which is the weight for
> the respondent within the country and adds up to the eligible
> population sample for each country in each wave. My objective is to
> identify certain cross-country effects over the time of the different
> waves.
>
> I am new to analyzing surveys, so I need guidance in correctly
> declaring the survey design for Stata using -svyset-. Specifically:
>
> a) I am not sure which variable to use as PSU and strata given that
> the data only provides weights but not PSUs. The survey says that it
> was conducted by first selecting the PSUs within each country to be
> statistically representative. The survey manual says the design was
> based on 3 stages of selection: 1) PSUs consist of clusters of
> households which were stratified by population size. 2) random routes
> used to select households within each PSU. 3) Respondents selected
> randomly within each household (there is a variable "wp12" identifying
> the number of potential eligible respondents per households ).
>
> b) How can I capture the fact that the survey has multiple waves per
> each country in -svyset- so that the population estimate is not (7 *
> the sum of population across countries) but rather the true
> population.
>
> Thank you in advance for your kind assistance and time.
> Best,
>
> Mohamad Mahmoud
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