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st: What does 'ssss' mean with replication dots?


From   Philip Burgess <philip.burgess.uq@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: What does 'ssss' mean with replication dots?
Date   Fri, 6 Nov 2009 17:18:18 +1000

I have two independent complex survey designs, one with 30 JK
replicate weights (survey conducted in 1997), the other with 60
(survey conducted in 2007).

I have combined these files in a manner similar to the Californian
Health Interview Surveys - http://www.chis.ucla.edu/methodology.html
(see the Methodology Paper on Examining Trends ... - this has detailed
instructions regarding how to combine such data with STATA).

So, my combined file has 90 replicate weights.

I svyset with the following command:

- svyset [pweight=mhsfinwt], jkrweight(wpm0101 - wpm0190,
multiplier(1)) vce(jackknife) mse -

When processing this design, for say, estimating propotions for the two surveys:

- svy jackknife : proportion mhpsyo12, over(nsmhwb)
(running proportion on estimation sample)

Jackknife replications (90)
----+--- 1 ---+--- 2 ---+--- 3 ---+--- 4 ---+--- 5
..................................................    50
..........ssssssssssssssssssssssssssssss

What does the 'ssss...' mean?

Thanks;

Philip
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