Hi Victoria, CEM doesn't use a distance metric and isn't based on the
propensity score. It coarsens and then runs exact matching. MatchIt calls
CEM, which computes L1; you might have a look at that. Its another R
package, also at my web site.
Gary
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*Gary King* - Albert J. Weatherhead III University Professor - Director,
IQSS - Harvard University
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On Mon, May 23, 2011 at 3:18 PM, <vfan(a)alum.mit.edu> wrote:
Hi there,
When I run summary after using MatchIt with method being CEM, what is the
default "distance" used? Is it the propensity score?
Also, does MatchIt automatically calculate the L1 imbalance measure in King
et al 2011?
Thank you so much in advance.
Best,
Victoria