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# Re: st: weights in pooled repeated cross sections

 From Steven Samuels <[email protected]> To [email protected] Subject Re: st: weights in pooled repeated cross sections Date Tue, 27 Sep 2011 16:32:37 -0400

```1. Pool
2. Divide weights by four (would affect only totals, but still a good idea)
3. -svyset- the whole thing.

Steve

On Sep 27, 2011, at 10:40 AM, Ivica Rubil wrote:

so, you're saying I just pool the 4 datasets, divide the weights by 4,
and apply -svyset- to the pooled dataset? Or should I rather use
-svyset- for each of the 4 datasets, pool them in one, and then divide
the weights by 4?
Further, sorry for bothering you: what are PSUs? How do I check if they
change form year to year?

--
Ivica Rubil
Ekonomski institut / The Institute of Economics, Zagreb
Trg J. F. Kennedyja 7, 10 000 Zagreb, Croatia
tel. +385-1-2362-269
fax. +385-1-2335-165
[email protected]
www.eizg.hr

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Steven
Samuels
Sent: 27. rujan 2011 15:51
To: [email protected]
Subject: Re: st: weights in pooled repeated cross sections

Ivica-
You can use the individual weights, Ivica, but divide by 4 so that they
sum to the average population total over the four years

You still have to write the rest of the -svyset- command.  If the PSUs
did not change over the four years, then treat the pooled sample as one
large sample, and use the same -svyset- statement that you would use for
a single year.  If some PSUs changed you will have to do some stratum
recoding. For an example see
http://www.cdc.gov/nchs/ppt/nchs2010/46_Moriarity.ppt

Steve

On Sep 26, 2011, at 12:03 PM, Ivica Rubil wrote:

Dear all,

I am trying to pool four repeated cross-sections of Croatian Hpusehold
Budget Survey.
For each year that I want to pool, I have sampling weights for each
observation (both household and person).
My questions are: What should I do with the weights once I pool the four
datasets? Is it wrong to use
dataset-specific weights in the pooled dataset and just run estimation
commands with the weight option, if
available? I am confused. Please, help.

Thanks,
Ivica Rubil

--
Ivica Rubil
Ekonomski institut / The Institute of Economics, Zagreb
Trg J. F. Kennedyja 7, 10 000 Zagreb, Croatia
tel. +385-1-2362-269
fax. +385-1-2335-165
[email protected]
www.eizg.hr

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