TY - JOUR TI - Improved Methods for Tests of Long‐Run Abnormal Stock Returns AU - John D. Lyon AU - Brad M. Barber AU - Chih‐Ling Tsai JO - The Journal of Finance PY - 1999 VL - 54 IS - 1 DO - 10.1111/0022-1082.00101 UR - https://doi.org/10.1111/0022-1082.00101 ER -