Thanks to Kit Baum, an update of the -fmlogit- package is now available
from SSC. The main change is that -fmlogit- is now faster. (For those
interested in the technical details: it now maximizes the quasi
likelihood function using the d2 method rather than the lf method, and
provides better starting values.)
-fmlogit- fits by quasi maximum likelihood a fractional multinomial
logit model. It models a set of dependent variables that each must
range between 0 and 1 and must always, for each observation, add up to
1: for example, they may be proportions. It is a multivariate
generalization of the fractional logit model proposed by Papke and
Wooldridge (1996).
Those who already have a copy of the program can update it by either
typing -ssc instal fmlogit, replace- or -adoupdate, update-. Those
who don't have a copy yet can instal it by typing -ssc install fmlogit-.
-- Maarten
Papke,Leslie E. and Jeffrey M. Wooldridge (1996), Econometric Methods
for Fractional Response Variables with an application to 401(k) Plan
Participation Rates. Journal of Applied Econometrics 11(6):619--632.
--------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany
http://www.maartenbuis.nl
--------------------------
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