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Re: st: cmogram command for Regression Discontinuity Design


From   Nick Cox <njcoxstata@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: cmogram command for Regression Discontinuity Design
Date   Mon, 5 Sep 2011 16:25:07 +0100

-cmogram- is a user-written program from SSC. Please recall that you
are asked to explain where user-written programs you refer to come
from.

The author of -cmogram- is not obviously active on Statalist. You may
need to contact him directly for good support.

I've not used this program except once on its publication, but this
sounds soluble. For example, you could -clonevar- your assignment
variable, and then in the cloned version change exact zeros to join
the bin to which you would prefer they be assigned. If this is not a
solution you may need to spell out exactly what you are trying and
exactly why it does not work, which is again is no more than you are
asked to do.

Nick

On Mon, Sep 5, 2011 at 4:04 PM, Borgomeo, Letizia
<L.Borgomeo@warwick.ac.uk> wrote:

I am using the cmogram command for plotting the means-per-bin of an
outcome variable against the assignment variable in a RDD. I am
wondering if there is any way of setting the bins in order to have all
the treated observations to the right and the untreated to the left of
the cutoff. The forcing variable range is [-37;61] and I need the last
bin in the LHS not to include the observations with a 0 value of the
assignment variable, since they are exposed to treatment. Yet  both
with histopts(width()) and histopts(bin()) I do not manage to do it.

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