DiPrete, Thomas A.Thomas A.DiPreteEngelhardt, HenrietteHenrietteEngelhardt0000-0002-4402-52562019-09-192014-09-2420040049-1241https://fis.uni-bamberg.de/handle/uniba/14211engEstimating Causal Effects with Matching Methods in the Presence and Absence of Bias Cancellationarticlehttps://www.demogr.mpg.de/papers/working/wp-2000-013.pdf