- eventstudy2 security_id date using security_returns_file, returns(security_returns) model(abnormal_return_model) marketfile(file_with_market/factor_returns) marketreturns(market_returns) idmarket(market_id) factor1(factor_return1) evwlb(event_window_lower_boundary) evwub(event_window_upper_boundary) eswlb(estimation_window_lower_boundary) eswub(estimation_window_upper_boundary) minevw(minimum_observations_event_window) minesw(minimum_observations_estimation_window) replace car1LB(CAR_window_1_lower_boundary) car1UB(CAR_window_1_upper_boundary) car2LB(CAR_window_2_lower_boundary)
- car2UB(CAR_window_2_upper_boundary) car3LB(CAR_window_3_lower_boundary) car3UB(CAR_window_3_upper_boundary)
evwlb(event_window_lower_boundary) specifies the lower boundary of the event window, measured in trading days relative to the event date. The default value is -20.
car1LB(CAR_window_1_lower_boundary) to car10LB(CAR_window_10_lower_boundary) specifies the lower boundary of the window over which cumulative (average) abnormal returns are to be calcuated.
1. ‘evwlb和evwub’ 与 ‘car1LB和car1UB’ 大小关系是什么,前者是否严格包含后者?
2. 在有 ‘car1LB和car1UB’ 的情况下,‘evwlb和evwub’ 作用是什么?