--- Andrea Rispoli <[email protected]> wrote:
> It is an Herfindahl index of concentration, it ranges from 0 to 1 (in
> principle) : in my specific case:
>
> Variable | Obs Mean Std. Dev. Min Max
>
-------------+--------------------------------------------------------
> H | 213620 .0190621 .0920916 0 .6477536
How many zeros do you have? ( type in Stata: -count if H == float(0)- )
Even though it is possible for a fractional logit to model a dependent
variable that includes zero (and one), if there are too many of these,
then that might indicate that these zeros occur due to a separate
process and need to be modeled separately.
-- Maarten
-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands
visiting address:
Buitenveldertselaan 3 (Metropolitan), room N515
+31 20 5986715
http://home.fsw.vu.nl/m.buis/
-----------------------------------------
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