Dear listers, I am using Jas Sekhon's Matching package to perform propensity score matching and like it a lot so far. Still though I wonder whether it is possible to impose restrictions on the Matching. I've seen the restriction parameter, but I doubt this is what I want (or I don't get how to use it more neatly).
Here's what I do: I used a pool several years of observations into one dataset and estimate a propensity score using a standard glm / probit approach. I then use the fitted values as propensity scores and perform the matching. Here's what I would like to do (in addition): restrict the matching in way that only allows for matches within the same year, so that only propensity scores within the same year are considered for a respective match. Note that I don't what to estimate the years separately. Is there a way to do so? best regards matthias --- Matthias Bannert KOF Swiss Economic Institute Leonhardstrasse 21 8045 Zürich Switzerland ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
