On Saturday, 17 March 2018, 17:00:20 CET, cem-request@lists.gking.harvard.edu <cem-request@lists.gking.harvard.edu> wrote:
Send Cem mailing list submissions to
To subscribe or unsubscribe via the World Wide Web, visit
or, via email, send a message with subject or body 'help' to
You can reach the person managing the list at
When replying, please edit your Subject line so it is more specific
than "Re: Contents of Cem digest..."
Today's Topics:
1. Using CEM without weights (Cristian Vaccari)
2. Re: Using CEM without weights (stefano iacus)
----------------------------------------------------------------------
Message: 1
Date: Fri, 16 Mar 2018 15:59:32 +0000
Subject: [cem] Using CEM without weights
Message-ID:
Content-Type: text/plain; charset="utf-8"
Dear all,
I am using CEM in a paper based on survey data. The goal is to estimate the
relationship between exposure to political incivility on social media and
an index of political participation (a count of eight different
activities). After matching units based on a set of covariates, I run a
negative binomial regression using the weight calculated by CEM that
equalizes the number of treated and control units within each stratum.
Among the feedback I have received on this paper has been the suggestion
that I should run the analysis on the CEM-matched units, but without using
the CEM-generated weight.
I have tried running the analysis only on the matched units without using
the weight and the results are consistent with the analysis where I used
the weight, but it seems to me using the weights would be more appropriate.
Would anyone be able to comment on whether using the matched units but not
the weight is a sensible/acceptable idea or not?
Many thanks for your help and for developing this great tool!
Cristian
-------------- next part --------------
An HTML attachment was scrubbed...
------------------------------
Message: 2
Date: Fri, 16 Mar 2018 17:03:44 +0100
Subject: Re: [cem] Using CEM without weights
Content-Type: text/plain; charset=us-ascii
Hi Cristian,
you should definitely use cem-weights :)
Stefano
>
> Dear all,
>
> I am using CEM in a paper based on survey data. The goal is to estimate the relationship between exposure to political incivility on social media and an index of political participation (a count of eight different activities). After matching units based on a set of covariates, I run a negative binomial regression using the weight calculated by CEM that equalizes the number of treated and control units within each stratum.
>
> Among the feedback I have received on this paper has been the suggestion that I should run the analysis on the CEM-matched units, but without using the CEM-generated weight.
>
> I have tried running the analysis only on the matched units without using the weight and the results are consistent with the analysis where I used the weight, but it seems to me using the weights would be more appropriate. Would anyone be able to comment on whether using the matched units but not the weight is a sensible/acceptable idea or not?
>
> Many thanks for your help and for developing this great tool!
>
> Cristian
> -
> --
> cem Mailing List, served by HUIT
> Cem mailing list
>
> To unsubscribe from this list or get other information:
>
------------------------------
_______________________________________________
Cem mailing list
To unsubscribe from this list or get other information:
End of Cem Digest, Vol 101, Issue 1
***********************************