“…Among them are those by Dragulescu and Yakovenko [19,20] for UK and USA, by Fujiwara et al [24] for Japan, by Nirei and Souma [30] for US and Japan, by Ferrero [22,23] for Japan, UK, New Zealand and Argentina. Also, Clementi and collaborators have looked at the power tails in income distributions for Italy, Germany, UK and USA [13,14,16].…”