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panel data

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New Contributor
Posts: 2

panel data

Hello. I have a panel with isin codes as company IDs and years from 2009 to 2017.The coverage for the companies are not proportional. Some have data only for one year and some have for all years. Now I want to keep only the companies that have data for the years 2013 to 2016. How can I code for this? And is it possible to create a new variable called firm-year that combines the isin codes and the years of coverage?

Esteemed Advisor
Posts: 5,474

Re: panel data

Show a small sample of input data and corresponding required output. No Excel files attachment please.

PG
New Contributor
Posts: 2

Re: panel data

can I take screenshot?

The data step manual in the forum was complicated for me because I'm not a professional programmer.

Esteemed Advisor
Posts: 5,474

Re: panel data

We can handle data in text form. Both for input and required output.

PG
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