Wooldridge, Jeffrey M., Introductory econometrics : a modern approach / - 5th ed. - Mason, OH : South-Western Cengage Learning, c2013. - xxv, 881 p. : ill. ; 24 cm. ISBN: 1111531048 (hbk.) 9781111531041 (hbk.) Subjects--Topical Terms: Econometrics. Dewey Class. No.: 330.015