Hi all,

I had been using a cem matching output to run regressions and have just now found that a large set of the output has the variable “cem_matched” ==1 while the “cem_strata” ==. (a.k.a. missing).  For those cases, there is also a weight stored in “cem_weights”.

Is this a common occurance?  If so, would you be able to explain when/why this occurs?

Ben

Ben Hoen

Staff Research Associate

Lawrence Berkeley National Laboratory

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