EXHIBIT 11 OGDEN CORPORATION AND SUBSIDIARIES DETAIL OF COMPUTATION OF EARNINGS APPLICABLE TO COMMON STOCK FOR THE THREE YEARS ENDED DECEMBER 31, 1993 1993 1992 1991 NUMBER OF SHARES USED FOR COMPUTATION OF EARNINGS PER SHARE: Average number of common shares 43,378,000 43,086,000 42,969,000 NUMBER OF SHARES USED FOR COMPUTATION OF EARNINGS PER SHARE ASSUMING FULL DILUTION: Average number of common shares 43,378,000 43,086,000 42,969,000 Issuable for options-treasury stock method Shares issuable for conversion of preferred stock 356,000 382,000 419,000 Shares issuable for conversion of debentures 42,000 115,000 124,000 Number of shares used for computation 43,776,000 43,583,000 43,512,000 COMPUTATION OF EARNINGS APPLICABLE TO COMMON SHARES: Income from continuing operations before cumulative effect of changes in accounting principles $62,130,000 $60,767,000 $57,604,000 Add (deduct): Adjustments arising from minority interest in consolidated subsidiaries 32,000 13,000 1,000 Dividends on Ogden preferred stock (199,000) (213,000) (239,000) Consolidated income applicable to Ogden common stock $61,963,000 $60,567,000 $57,366,000 Loss from discontinued operations ($13,880,000) Cumulative effect of changes in accounting principles ($5,340,000) ($5,186,000) COMPUTATION OF EARNINGS APPLICABLE TO COMMON SHARE ASSUMING FULL DILUTION: Income from continuing operations before cumulative effect of changes in accounting principles $62,130,000 $60,767,000 $57,604,000 Add: Adjustments arising from minority interest in consolidated subsidiaries 32,000 13,000 1,000 Debenture interest (net of applicable income taxes) 16,000 49,000 56,000 Consolidated income applicable to Ogden common stock $62,178,000 $60,829,000 $57,661,000 Loss from discontinued operation ($13,880,000) Cumulative effect of changes in accounting principles ($5,340,000) ($5,186,000) Note: Current options result in less than three percent dilution with the expectation of continuing at less than three percent dilution.