Hi Stephanie,
We did find that there was a bug in the cem routine that was causing these
missing strata. It shouldn't affect the weights or any output, but it did
cause problems with the strata. To install a beta version that doesn't have
this problem, you can run this code in Stata:
ado uninstall cem
net from
https://dl.dropboxusercontent.com/u/5379343/
net install cem, force
Cheers,
Matt
~~~~~~~~~~~
Matthew Blackwell
Assistant Professor of Government
Harvard University
url:
http://www.mattblackwell.org
On Mon, Feb 8, 2016 at 5:24 PM, Moulton, Stephanie <moulton.23(a)osu.edu>
wrote:
Did you ever find a response to the question about
STATA Output from CEM-
matched observations with missing strata? We are finding the same problem
with our data. None of the matching variables have missing data, yet many
of the observations are being assigned to a “missing” stratum (complete
with CEM weights for the missing stratum).
Any insights?
Thanks!
Stephanie Moulton
Associate Professor and Director of Doctoral Studies
John Glenn School of Public Affairs
The Ohio State University
http://glenn.osu.edu/faculty/glenn-faculty/moulton/
<https://urldefense.proofpoint.com/v2/url?u=http-3A__glenn.osu.edu_faculty_glenn-2Dfaculty_moulton_&d=CwMFAg&c=WO-RGvefibhHBZq3fL85hQ&r=EwICq0J5pL8CwgEJz8qkmauGonk0XmiLpxcYOEgk2a0&m=YGUN_261jitTmplsaLFgjZvx5BDsr2yCnmgT_UeoSOk&s=6ttUBznbyZnvNx1mhK8ivYys_CVTGYAGHBgNNieiYXs&e=>
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