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Re: How to control for the year of sample [message #21914 is a reply to message #21906]

Thu, 07 January 2021 13:38

Bridgette-DHS
Messages: 3199
Registered: February 2013

Senior Member

Following is a response from DHS Research & Data Analysis Director, Tom Pullum:

It would be important to include survey adjustments with svyset and svy. In most surveys, the sampling strata are combinations of region and urban/rural residence. If svyset includes the strata() option then you have adjusted for the role of region in the sample design. You can also include region as a covariate. With multiple surveys you need to make the strata survey-specific. There have been postings that describe how to do this with "egen group".

Successive surveys are not cohorts. Date of survey is a time period indicator. You could include that as a covariate. Cohort is identified by year of birth. You can link birth cohorts across surveys if you construct a covariate based on year of birth.

I don't see how cohort, survey, or region are nested in any way. They are crossed. I can imagine having an interaction term for combinations of regions and cohorts, for example, although that would give a lot of terms.

Frankly, I don't think much will be gained by using a multi-level model--however it would be framed--in this context. I doubt that the theoretical justification (which I agree with) would translate into statistical insights. But it could be worth a try.

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[Message index]

		How to control for the year of sample By: olympiaca on Thu, 07 January 2021 08:44
		Re: How to control for the year of sample By: olympiaca on Thu, 07 January 2021 11:58
		Re: How to control for the year of sample By: Bridgette-DHS on Fri, 08 January 2021 09:45
		Re: How to control for the year of sample By: Bridgette-DHS on Thu, 07 January 2021 13:38
		Re: How to control for the year of sample By: olympiaca on Fri, 08 January 2021 04:52
		Re: How to control for the year of sample By: Bridgette-DHS on Fri, 08 January 2021 07:47
		Re: How to control for the year of sample By: olympiaca on Fri, 08 January 2021 09:30

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