# Changes

# Patent portfolio size: grouped into 1-100 , 100-900 , >900 # Relative size of potential disputants: measure of the asymmetry in portfolio size between a patentee and a representative disputant he can expect to face on each patent.Let $$Z_{cf}$ be the portfolio size for firm$f$in technology class$c$, and let$Z_c = \sum_f Z_{cf}$denote all patents in the class.$Z_f = \sum_c Z_{cf}$is the portfolio size for firm$fZ_c^* Z_c / n_c$is the average portfolio size of the$n_c$firms with patents in class$c$.The relative portfolio size of firm$f$for patent$ i$is given by:$R_{if} = Z_f /\sum_c w_{ci} Z_c^*$, where$w_ci = F_{ci}/F_i$is the fraction of forward citations to patent$i$that falls into technology class$c\$.