Angrist, Joshua D., and Jörn-Steffen Pischke. Mostly Harmless Econometrics: An Empiricist’s Companion. Princeton: Princeton University Press. Web. <https://ebookcentral.proquest.com/lib/bilibrary/detail.action?docID=5710107>.
‘Compendium of Articles’. : n. pag. Print.
Gerber, Alan S., and Donald P. Green. Field Experiments: Design, Analysis, and Interpretation. New York: Norton. Print.
Imbens, Guido W., and Donald B. Rubin. Causal Inference for Statistics, Social, and Biomedical Sciences: An Introduction. Cambr, 2015. Print.
