Propensity Scores and Matching
Austin, P.C., & Stuart, E.A. (2015). Moving towards best practice when using inverse probability of treatment weighting (IPTW) using the propensity score to estimate causal treatment effects in observational studies. Statistics in Medicine, Volume 34, Issue 28.
Brookhart, M.A., Schneeweiss, S., Rothman, K.J., Glynn, R.J., Avorn, J., Sturmer, T. (2006). Practice of Epidemiology: Variable Selection for Propensity Score Models. American Journal of Epidemiology, Vol. 163, No. 12.
Lunt, M. (2013). Practice of Epidemiology: Selecting an Appropriate Caliper Can Be Essential for Achieving Good Balance With Propensity Score Matching. American Journal of Epidemiology, Volume 179, Issue 2.