Angrist, J.D. and Pischke, J.-S. (2015) Mastering Metrics: The Path from Cause to Effect. Princeton: Princeton University Press.
Ashenfelter, O., Levine, P.B. and Zimmerman, D.J. (2003) Statistics and Econometrics: Methods and Applications. Chichester: Wiley.
Economics - LibGuides at University of Exeter (no date). Available at: https://libguides.exeter.ac.uk/EconomicsHomePage.
Mostly harmless econometrics : an empiricist’s companion (2009). Princeton University Press. Available at: http://encore.exeter.ac.uk/iii/encore/record/C__Rb1846953?lang=eng.