borderline significantP < 0.1
On the Pfizer announcement day, ARs for 9 of the 16 firms were positive and significant ( P < 0.05), and 2 more were borderline significant ( P < 0.1).
On the Pfizer announcement day, ARs for 9 of the 16 firms were positive and significant ( P < 0.05), and 2 more were borderline significant ( P < 0.1).