New subject: cem_matched ==1 and cem_strata==. <missing>

11 Sep 2014

Just trying you again.  (Matt & Ariel am trying your emails too)

Any idea why I would be getting such a high % of missing.  

In my dataset I have 30,473 cases where "cem_matched" ==1 (25,090 control,
5,383 treated).  Of those 14,245 have a "cem_strata" ==. (11,624 control,
2,621 treated).  

FYI, here is an output of the weights (cem1w) - treatment is pv, control is
non-pv

Thanks for any help you might be able to offer.

Ben

Ben Hoen

LBNL

Office: 845-758-1896

Cell: 718-812-7589

From: Ben Hoen [mailto:bhoen@lbl.gov] 
Sent: Tuesday, September 09, 2014 3:43 PM
To: cem(a)lists.gking.harvard.edu
Subject: cem_matched ==1 and cem_strata==. <missing>

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

Office: 845-758-1896

Cell: 718-812-7589

bhoen(a)lbl.gov <mailto:bhoen@lbl.gov> 

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Re: [cem] cem_matched ==1 and cem_strata==. <missing>