EXHIBIT 11 DUCOMMUN INCORPORATED AND SUBSIDIARIES RECONCILIATION OF THE NUMERATORS AND DENOMINATORS OF THE BASIC AND DILUTED EARNINGS PER SHARE COMPUTATIONS For the Year Ended December 31, 2001 -------------------------------------------- Income Shares Per-Share (Numerator) (Denominator) Amount ----------- ------------- --------- BASIC EPS Income Available to Common Stockholders $14,603,000 9,662,000 $1.51 ===== EFFECT OF DILUTIVE SECURITIES Stock Options -- 64,000 ----------- ---------- DILUTED EPS Income Available to Common Stockholders + Assumed Conversions $14,603,000 $9,726,000 $1.50 =========== ========== ===== For the Year Ended December 31, 2000 -------------------------------------------- Income Shares Per-Share (Numerator) (Denominator) Amount ----------- ------------- -------- BASIC EPS Income Available to Common Stockholders $12,720,000 9,650,000 $1.32 ===== EFFECT OF DILUTIVE SECURITIES Stock Options -- 111,000 ----------- ---------- DILUTED EPS Income Available to Common Stockholders + Assumed Conversions $12,720,000 $9,761,000 $1.30 =========== ========== ===== For the Year Ended December 31, 1999 --------------------------------------------- Income Shares Per-Share (Numerator) (Denominator) Amount ----------- ------------- --------- BASIC EPS Income Available to Common Stockholders $13,344,000 10,209,000 $1.32 ===== EFFECT OF DILUTIVE SECURITIES Stock Options -- 309,000 ----------- ---------- DILUTED EPS Income Available to Common Stockholders + Assumed Conversions $13,344,000 10,518,000 $1.28 =========== ========== ===== 1