If the second stage is SRS with replacement and you are analyzing households
(not people in households), I THINK it is ok as is. If you know someone with
SUDAAN, you might be able to run a comparison, provided you have all the
necessary information for the sample design.
Bryan Sayer
Statistician, SSS Inc.
-----Original Message-----
From: Ali Karim
To: [email protected]
Sent: 6/3/03 10:35 AM
Subject: st: FPC & 2-stage cluster sampling
Dear Statalist readers,
I have a dataset with two-stage cluster sampling. In first stage 30
PSU's
were selected randomly (without replacement) from a universe of 60
clusters
(i.e. fpc = .5). On the second stage 30 households were selected
randomly
from each PSU. I planned to analyze household attributes using Stata's
'svy'
commands. I did the following:-
.svyset psu cluster
.svyset fpc frac
And then run my survey commands. The output gave me the following
comment:-
"Finite population correction (FPC) assumes simple random sampling
without
replacement of PSUs within each stratum with no sub-sampling within
PSUs".
However, the assumption does not seem to hold for my sampling design.
Therefore, I am not sure how the assumption affects my analysis. Am I
using
the survey command correctly for my given situation?
Thanks in advance.
Ali
_________________________________________________________________
Help STOP SPAM with the new MSN 8 and get 2 months FREE*
http://join.msn.com/?page=features/junkmail
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
