Fwd: Antw: Re: [cem] Coarsening by explicit user choice - Cem

5 Aug 2009

Begin forwarded message:

...
  From: Martina Zweimueller
&lt;Martina.Zweimueller(a)jku.at&gt;
 Date: 05 agosto 2009 9:53:14 GMT+02:00
 To: stefano iacus &lt;stefano.iacus(a)unimi.it&gt;
 Subject: Antw: Re: [cem] Coarsening by explicit user choice

 Yes, I refer to the Stata version. I think the documentation is
 confusing in this point. I would write ... if you want to create a
 certain  number of equally space bins, say 10, place #11 in  
 parentheses
 after the variable.

 Best regards,
 Martina

 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

 >> stefano iacus
&lt;stefano.iacus(a)unimi.it&gt; 8/5/2009 9:42  >>>  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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