Hi Meysam. see Section 5.1 of this article
<https://gking.harvard.edu/files/political_analysis-2011-iacus-pan_mpr013.pdf>.
CEM works fine with more than 2 treatment categories. However, matching
across 6 categories will require a lot of data or luck. alternatively you
can dichotomize, perhaps repeatedly, although beware of changing quantities
of interest.
Gary
--
*Gary King* - Albert J. Weatherhead III University Professor - Director,
IQSS <http://iq.harvard.edu/> - Harvard University
GaryKing.org - King(a)Harvard.edu - @KingGary <https://twitter.com/kinggary> -
617-500-7570 - Assistant <king-assist(a)iq.harvard.edu>: 617-495-9271
On Mon, Apr 9, 2018 at 4:55 PM, Meysam Alizadeh <alizadeh.meysam(a)gmail.com>
wrote:
> Hi,
>
> I'm comparing the average values of a variable between 6 different groups.
> Before comparing, I need to control for some covariates. I decided to use
> matching for this purpose. However, I don't know what is the best way to
> match these 6 samples since CEM only works for matching 2 samples.
>
> Any help is appreciated.
>
> Best,
> Meysam
>
> --
> *Meysam Alizadeh*
> Postdoctoral Fellow | Center for Complex Networks and Systems Research
> School of Informatics and Computing
> Indiana University Bloomington
> Web <http://malizad.github.io> | Twitter
> <https://twitter.com/M_Aliizadeh> | LinkedIn
> <https://qa.linkedin.com/in/malizadeh>
>
Hi,
I'm comparing the average values of a variable between 6 different groups.
Before comparing, I need to control for some covariates. I decided to use
matching for this purpose. However, I don't know what is the best way to
match these 6 samples since CEM only works for matching 2 samples.
Any help is appreciated.
Best,
Meysam
--
*Meysam Alizadeh*
Postdoctoral Fellow | Center for Complex Networks and Systems Research
School of Informatics and Computing
Indiana University Bloomington
Web <http://malizad.github.io> | Twitter <https://twitter.com/M_Aliizadeh>
| LinkedIn <https://qa.linkedin.com/in/malizadeh>
