Hi Torb, 

I'm not super familiar with the "diff" command, but a quick search seems to imply that you should use "[weight=cem_weights]" instead of "iweight." Hope that helps!

Cheers,
Matt

~~~~~~~~~~~
Matthew Blackwell
Assistant Professor of Government
Harvard University
url: http://www.mattblackwell.org

On Thu Dec 11 2014 at 6:29:32 AM Luck MS <torben_pt@hotmail.com> wrote:

Dear all,
 
I am using the CEM command in Stata to generate a control sample. Given that I am not restricting the matching to a one-to-one solution I need to use weights by setting up [iweight=cem_weights]. However, I don’t find a way to include the weights in the Difference in differences estimation (syntax diff). Would someone have a suggestion on that?

 

Thanks and best regards,

Torb

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