Estimates of the parameters of the modified PRG model of the SB system for the period 2005–2012 based on the FG2000 list of firms.

and are calculated by yearly variations of the firms' asset size between consecutive years, except for 2005 we use data of 2003, instead of 2004 which is missing. Using these values, is computed from the estimate of the Pareto index , inverting Eq. (3). The reported value of is the one that minimizes the distance between the observed and the simulated firm size distributions. Specifically, i) we compute with being the -th largest firm in the simulation, the -th largest firm in the FG2000 list and is the average over 100 simulations. ii) We find that minimizes the mean square deviation , with .