EXHIBIT 11 OCCIDENTAL PETROLEUM CORPORATION AND SUBSIDIARIES COMPUTATION OF EARNINGS PER SHARE FOR THE THREE MONTHS ENDED MARCH 31, 2000 AND 1999 (Amounts in thousands, except per-share amounts) Three Months Ended March 31 ----------------------------- 2000 1999 - --------------------------------------------------------------------------------- ----------- ------------ BASIC EARNINGS PER SHARE Income (loss) $ 271,001 $ (56,400) Effect of repurchase of Trust Preferred Securities 611 -- Preferred stock dividends -- (3,639) ----------- ------------ Earnings (loss) before effect of changes in accounting principles 271,612 (60,039) Cumulative effect of changes in accounting principles, net -- (13,368) ----------- ------------ Earnings (loss) applicable to common stock $ 271,612 $ (73,407) =========== ============ Weighted average common shares outstanding 368,125 347,839 =========== ============ Basic earnings per share Income (loss) before effect of changes in accounting principles $ .74 $ (.17) Cumulative effect of changes in accounting principles, net -- (.04) ----------- ------------ Basic earnings (loss) per common share $ .74 $ (.21) =========== ============ DILUTED EARNINGS PER SHARE Earnings (loss) from continuing operations applicable to common stock $ 271,612 $ (60,039) Cumulative effect of changes in accounting principles, net -- (13,368) ----------- ------------ Earnings (loss) applicable to common stock $ 271,612 $ (73,407) =========== ============ Weighted average common shares outstanding 368,125 347,839 Dilutive effect of exercise of options outstanding 111 -- ----------- ------------ 368,236 347,839 =========== ============ Diluted earnings per share Income (loss) before effect of changes in accounting principles $ .74 $ (.17) Cumulative effect of changes in accounting principles, net -- (.04) ----------- ------------ Diluted earnings (loss) per common share $ .74 $ (.21) ================================================================================= =========== ============ The following items were not included in the computation of diluted earnings per share because their effect was antidilutive (in thousands, except per-share amounts): Three Months Ended March 31, 2000 1999 - ------------------------------------------------------ ------------------ ------------------ STOCK OPTIONS Number of shares 4,969 4,404 Price range per share $19.875 -- $29.438 $17.750 -- $29.625 Expiration range 8/18/00 -- 7/8/08 8/20/99 -- 1/2/08 CONVERTIBLE PREFERRED STOCK $3.00 Number of shares -- 11,946 Dividends paid -- $3,639 - ------------------------------------------------------ ------------------ ---------------