Equating groups. West SG, Thoemmes F. SG West, F Thoemmes - The SAGE handbook of social research …, 2008 - books.google.com GSID: NpTrdzByyrEJ
How Close is Close Enough?: Testing Nonexperimental Estimates of Impact Against Experimental Estimates of Impact with Education Test Scores as Outcomes. [No authors listed] ET Wilde, R Hollister - 2002 - Citeseer GSID: jabR_a7IM_MJ
A systematic review of propensity score methods in the social sciences. [No authors listed] GSID: xw3Xh5n_uHwJ
Propensity scores: An introduction and experimental test. Luellen JK, Shadish WR, Clark MH. JK Luellen, WR Shadish, MH Clark - Evaluation Review, 2005 - journals.sagepub.com GSID: -f7j4ZGhez4J
Proceeding from observed correlation to causal inference: The use of natural experiments. [No authors listed] GSID: hdjXOSf6kMAJ