Woolridge Jeffrey M Econometric analysis of cross section and panel data. - 2nd - Cambridge The MIT Press 2010 - xxvii,1064p cm. ISBN: 20527.599999999999 Standard No.: 117570 Source: 223, 19/10/2012, Classic Book Service Textual Subjects--Topical Terms: Business Economics Dewey Class. No.: X:(B), Q0;1-3