I have a panel data with 1002 observations. N=334, T=3. My goal is to create 2 columns representing N and the year T. For example, the first 334 observations will have ID from 1 to 334 and a fixed value of T=1. The next set will have observations from 335 to 668 and T=2. I tried this piece of code but it did not work. DATA WAGE; SET WAGE(first_obs = 2)(obs = 335); retain Person_ID = 1; retain Year_ID = 1; Person_ID + 1; RUN;
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