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RE: st: manipulating matrix elements


From   Steve Vaisey <vaisey@unc.edu>
To   statalist@hsphsun2.harvard.edu
Subject   RE: st: manipulating matrix elements
Date   Wed, 29 Mar 2006 13:48:32 -0500

I'm on digest mode, so forgive the off-cycle nature of my replies.

I just checked the archives and saw Nick's question about the additive element. The reference for this is:

Martin, John Levi. 1999. "Entropic Measures of Belief System Constraint." Social Science Research 28:111-134.

A simpler and perhaps more useful exposition is given in:

-----. 2002. "Power, Authority, and the Constraint of Belief Systems." American Journal of Sociology 197:861-904.

Adding the ln(M) [where M = number of cells] is meant to standardize the entropy (actually, the negative of the entropy) so that it varies from 0 to 1 (i.e., from more to less entropic). This standardization assumes, however, that no (or few) cells have particularly low counts. As such, it's really only useful in large-n applications. But since that's what I have, that's OK.

I still like the .ado version, since it allows me to do other things I might want to do. Would you mind, Nick, adding the additive term into the program you wrote? Thanks.

Steve




--
====================================================
Stephen Vaisey
National Science Foundation Graduate Research Fellow
Caroline H. and Thomas S. Royster, Jr. Fellow
Department of Sociology
University of North Carolina at Chapel Hill
200 Hamilton Hall (CB #3210)
Chapel Hill, NC 27599
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