Dear all, I need an help.
My database: panel data (unbalanced), 1200 firms, 8 variables.
First, I need to calculate the median value of a given variable (es. var1), year-by-year. Then, I would divide firms evenly into three groups according to their value in each year, I mean firms residing in the low-, middle- and high- var1 group. Could anybody tell me the commands I need to use? Thank you very much in advance for any illustrative example.
D.
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