We empirically investigate the influence of German universal banks on the p
erformance of German firms. We take into account banks' control rights from
equity ownership, banks' proxy-voting rights, and the concentration of con
trol rights from equity ownership (which includes complex forms such as pyr
amids, cross-shareholdings, and stocks with multiple votes). We also accoun
t for voting restrictions and the German codetermination system (under whic
h employees of large firms have control rights that are unrelated to equity
ownership). We find that firm performance improves to the extent that equi
ty control rights are concentrated. Moreover, bank control rights from equi
ty ownership significantly improve firm performance beyond what nonbank blo
ckholders can achieve. (C) 2000 Elsevier Science S.A. All rights reserved.