1[1]FAMA E F, FRENCH K R. Disappearing dividends:changing firm characteristics or lower propensity to pay[J].Journal of Financial Economics, 2001,60:3-43.
2[2]IKENBERRY D L, IAKONISHOK J,VERMAELEN T. Market underreaction to open-market share repurchases [J]. Journal of Financial Economics, 1995,39:181-208.
3[3]GRULLON G. The information content of share repurchase programs[J]. Unpublished Working Paper, 2000, 11:113-124
