1 EXHIBIT 11-14 DTE ENERGY COMPANY BASIC AND DILUTED EARNINGS PER SHARE OF COMMON STOCK Year Ended December 31 ------------------------------------------------ 1998 1997 1996 ---- ---- ---- (Thousands, except per share amounts) BASIC: Net Income..................................... $ 443,012 $ 417,333 $ 309,296 Weighted average number of common shares outstanding (a)....................... 145,076 145,101 145,120 Earnings per share of Common Stock based on weighted average number of shares outstanding........................ $ 3.05 $ 2.88 $ 2.13 DILUTED: Net Income..................................... $ 443,012 $ 417,333 $ 309,296 Weighted average number of common shares outstanding (a)....................... 145,076 145,101 145,120 Incremental shares from assumed conversion of options........................ 106 12 - ------------ ------------ ------------ 145,182 145,113 145,120 ============ ============ ============ Earnings per share of Common Stock assuming conversion of options............... $ 3.05 $ 2.88 $ 2.13 - --------------------------- (a) Based on a daily average.