Exhibit 11 THE BOSTON BANCORP Computation of Primary and Fully Diluted Earnings Per Share Year Ended October 31 ------------------------------------ 1995 1994 1993 ---- ---- ---- Net Income. . . . . . . . . . $28,345,931 $24,577,986 $35,320,240 =========== =========== =========== Primary earnings per share: Weighted average number of common shares outstanding including common stock equivalents . . . . . . . . . 5,303,797 5,444,982 6,079,216 ========= ========== =========== Earnings per share. . . . . . $5.34 $4.51 $5.81 ===== ===== ===== Fully diluted earnings per share: Weighted average number of common shares outstanding including common stock equivalents . . . . . . . . . $5,318,326 $5,444,982 $6,140,108 ========== =========== =========== Earnings per share. . . . . . $5.33 $4.51 $5.75 ===== ===== =====