[cem] Working with a 3-group treatment.

Hello all, I am attempting to implement the coarsened exact matching technique described in Iacus, King, and Porro (2011). The "treatment" in this case has three categories. It is clear from section 5.1 of the paper that this is not a problem for the technique generally. The question I have is how to calculate the weights, or whether the weights are strictly necessary. If anyone can you point me in the direction of resources that might illuminate this issue I would be grateful. Best, Rose -- Rose Anne Medeiros, Ph.D. Quantitative Methodologist Department of Sociology Rice University (713)348-4397