I guess you refer to the Stata version of cem.
You are right, that is the number of cutpoints including the extremes,
so 11 cutpoints means 10 intervals.
Thanks for raising this
stefano
On 05/ago/09, at 09:32, Martina Zweimueller wrote:
The CEM-documenation says that if you want to create a
certain
number of
equally space bins, say 10, place #10 in parentheses after the
variable.
However if you have a variable with 10 values (e.g. running from 1 to
10) and you want to match on each value, the argument `variable' (#10)
gives you only 9 strata, whereas `variable' (#11) gives you 10
strata.
Martina Zweimüller
Martina ZWEIMÜLLER
Department of Economics
Johannes Kepler University Linz
Altenbergerstr. 69
A-4040 Linz, Austria
martina.zweimueller(a)jku.at
Tel.: +43-(0)732-2468-5393
Fax: +43-(0)732-2468-8238
http://www.econ.jku.at/Zweimuller/
http://www.labornrn.at
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