Key points are not available for this paper at this time.
Josef Lakonishok, Andrei Shleifer, Robert W. Vishny, Oliver Hart, George L. Perry, The Structure and Performance of the Money Management Industry, Brookings Papers on Economic Activity. Microeconomics, Vol. 1992 (1992), pp. 339-391
Lakonishok et al. (Wed,) studied this question.