st: estimating expenditure quartiles for subgroups of survey data

["Waldo, Daniel R. (CMS/ORDI)" <Daniel.Waldo@cms.hhs.gov>]

I would like to test for statistically significant differences in health
expenditure quartiles for subpopulations (different kinds of insurance)
of my survey data, but cannot seem to find the proper way to do this.
Can somebody point me in the right direction?
Thanks! 


*
*   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/