how would I only include observation for certain crosssection

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msyed
Posts: 3
Joined: Wed Jul 04, 2018 6:44 pm

how would I only include observation for certain crosssection

Postby msyed » Wed Oct 03, 2018 8:29 pm

Dear all,

I am using a panel data set with 900 cross-section (firms) and period between 2010-2016. I would like to remove cross-sections with only two years of data available. So, essentially I like to keep observations for firms with more than two years of observations in my analysis. I guess, i can do this at the series level or when I am estimating the output from the model. I am not sure about the condition that I need to set. Any help will be great.

Lalan_dk
Posts: 22
Joined: Tue Apr 10, 2018 9:51 pm

Re: how would I only include observation for certain crosssection

Postby Lalan_dk » Sat Oct 06, 2018 12:11 am

maybe something like this:

Code: Select all

series numberyear=@obsby(crossid, crossid)
smpl if numberyear>2


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