TY - GEN digital ID - 131100734 TI - Causal effects in non-experimental studies: re-evaluating the evaluation of training programs AU - Dehejia, Rajeev H. AU - Wahba, Sadek PY - 1998 PB - Cambridge, Mass. DB - UniCat KW - Zonder onderwerpscode UR - https://www.unicat.be/uniCat?func=search&query=sysid:131100734 AB - ER -