Angrist, Joshua David. Mostly harmless econometrics : an empiricist’s companion / by Joshua D. Angrist and Jorn-Steffen Pischke. - Princeton : Princeton University Press, 2009. - xiii, 373 p. : ill. ; 22 cm. ISBN: 9780691120355 Subjects--Topical Terms: Econometrics; Regression analysis. Dewey Class. No.: 330.015195 ANG