@article {Evaluating2000,
title = {Evaluating Programmes:Experiments, Non-Experiments and Propensity Scores},
year = {2000},
url = {https://www.esri.ie/publications/evaluating-programmes-experiments-non-experiments-and-propensity-scores},
author = {Conniffe, D., Gash, V., and O'Connell, P.},
journal = {ESRI Working Paper 126},
}