If nothing else, you have the problem of comparing a portion to a whole,
which is not independent. That is, the metro area contains the tract and
thus any standard error term needs to contain the covariance.
Bryan Sayer
Statistician, SSS Inc.
[email protected]
-----Original Message-----
From: Joseph Sudano [mailto:[email protected]]
Sent: Monday, February 24, 2003 4:04 PM
To: [email protected]
Subject: st: segregation measures at the census tract level
OK...we are familiar with the aggregate measures of segregation at the
city/MSA level. What if one wants to characterize the racial/ethnic
population of a census tract relative to the city/MSA in which it is
embedded? A simple minority percentage or proportion in a tract wont
capture the dispersion of a group across tracts...it's just a compositional
measure. We are thinking of using the following (and are eliciting
feedback):
(Tdiff) - (mean of Tdiff)/ (S.E of Tdiff),
where Tdiff= proportion of minority group X in the tract minus the
proportion of X in the city/MSA; mean of Tdiff= city/SMA specific mean of
Tdiffs; and S.E. of Tdiff=city/MSA specific S.E. of Tdiffs. We have also
toyed around (cognitively) with using the S.E. of all Tdiffs across the US
in the denominator....very confused. Any help/comments appreciated.
I'll take personalized responses if folks would rather not muddy up the list
with such a specific issue and if you have any questions about why we want
to have a measure of segregation at the tract level, but hey, you decide.
Joseph J. Sudano, Jr., Ph.D.
Senior Instructor of Medicine
Center for Health Care Research and Policy
Case Western Reserve University at The MetroHealth System
Rammelkamp 236A
2500 MetroHealth Drive
Cleveland, OH 44109
Office: 216.778.1399
Fax: 216.778.3945
*****************************************
This email and all attachments that may have been included are intended only
for the use of the party to whom/which the email is addressed and may
contain information that is privileged, confidential, or exempt from
disclosure under applicable law. If you are not the addressee or the
employee or agent of the intended recipient, you are hereby notified that
you are strictly prohibited from printing, storing, disseminating,
distributing, or copying this communication. If you have received this
communication in error, please contact the Director of Risk/Privacy
Management at (216)778-5776.
*
* 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/
