@book{Angrist_Pischke_2009, address={Princeton}, title={Mostly harmless econometrics: an empiricist’s companion}, publisher={Princeton University Press}, author={Angrist, Joshua David and Pischke, Jörn-Steffen}, year={2009} }
@book{Cameron_Trivedi_2005, address={Cambridge}, title={Microeconometrics: methods and applications}, url={http://www.loc.gov/catdir/toc/ecip051/2004022273.html}, publisher={Cambridge University Press}, author={Cameron, Adrian Colin and Trivedi, P. K.}, year={2005} }
@book{Wooldridge_2002, address={Cambridge, Mass}, title={Econometric analysis of cross section and panel data}, publisher={MIT Press}, author={Wooldridge, Jeffrey M.}, year={2002} }
