Ekkehart Boehmer; Jim Masumeci; Annette B. Poulsen (1991). Event-study methodology under conditions of event-induced variance. , 30(2), 253–272.
doi:10.1016/0304-405x(91)90032-f
url to share this paper:
An interview with Sci-Hub Founder Alexandra Elbakyan Who exactly should pay for academic research