[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]
Re: st: national survey with complex sample design
Some other thoughts. Ordinarily the first-level strata will be
geographic in a single year, so that "YEAR-GEOGRAPHIC STRATUM" will
be the highest level stratum. If PSU's are selected within a YEAR,
there may be independent subsampling in subsequent years. Thus in
some surveys, there may be multiple "year" substrata within the first
My point is that Stata can handle these complications as well, if not
better than, SUDAAN. Stata, but not SUDAAN, can do sample raking of
weights to known population totals on multiple control variables,
thanks to Nick Winter's fine -survwgt- package.
On Feb 8, 2007, at 2:03 PM, Steven Samuels wrote:
I think that Stata will also work if strata & PSU's do overlap
years. For example: ordinarily "YEAR" would be a first-level
stratum and PSU's would be sampled independently within a year.
However if a PSU sampled in one year is re-used for subsequent years,
then the YEAR of PSU selection would still be the highest level
stratum, but the year in which the observation is made would be the
one to use for the analysis of time trends.
OOn 2/8/07, Hillel Alpert <HALPERT@hsph.harvard.edu> wrote:
Could someone please advise whether and how Stata can handle
national survey data with multiple years and complex survey sample
A single year data can readily be handled in Stata based on the
weight and strata variable. Can we analyze the appended data over
two or more years the same way, or is a program such as SUDAAN
needed? The analysis will be of time trends, and we assume the
sampling was not identical from year to year.
* For searches and help try: