Chances of survival according to the company's age - Divide by fo3 do3 - Cat. definitions are in #2 ``` @collapse n_firms = rowcount(distinct(frame_id)), by(firmage, categ) @egen max_n = max(cond(firmage == 0, n_firms, 0)), by(categ) @generate survival = 100 * n_firms / max_n ``` "fo3 vs do3 kezdeti méretkategória esetleg megbontva belépési kohorsz (foundyear) szerint "