Notes to Consolidated Financial Statements (continued) (14) Summary Selected Quarterly Financial Data (Unaudited) The following is a summary of selected quarterly financial data for the years ended December 31, 1999 and 2000 (in thousands, except per share data): March 31, June 30, Sept. 30, Dec. 31, Quarter Ended 1999 1999 1999 1999 Revenues $17,929 $19,671 $21,981 $27,687 Income from operations $ 2,211 $ 2,710 $ 3,741 $ 5,198 Net income $ 1,904 $ 2,235 $ 2,855 $ 3,988 Basic net income  per common share $ 0.11 $  0.13 $ 0.16 $ 0.21 Diluted net income  per common share $ 0.10 $  0.12 $ 0.14 $ 0.18 March 31, June 30, Sept. 30, Dec. 31, Quarter Ended 2000 2000 2000 2000 Revenues $30,817 $38,279 $40,137 $47,914 Income from operations $ 4,096 $ 5,830 $ 7,345 $ 9,873 Net income $ 3,469 $ 4,876 $ 5,939 $ 7,330 Basic net income  per common share $ 0.17 $ 0.23 $ 0.28 $ 0.34 Diluted net income  per common share $ 0.15 $  0.20 $ 0.24 $ 0.30 Forrester Research | Annual Report 2000