Links

Econometric Analysis of Cross Section and Panel Data by Jeffrey M Wooldridge (Oct 1, 2010)

Mostly Harmless Econometrics: An Empiricist's Companion by Joshua D. Angrist and Jörn-Steffen Pischke(Jan 4, 2009)

Econometric Analysis (7th Edition) by William H. Greene(Feb 13, 2011)