00539pam a2200121 a 4500020002100000082001700021100002000038245006100058260005000119300002700169500004400196650017700240  a0133097250 (pbk)00a001.433bWEI1 aWeiss, Carol H.10aEvaluation bmethods for studying programs and policies   aUpper Saddle River, N.J.bPrentice Hallc1998  axii, 372 p. c; 23 cm.  aRev. ed. of: Evaluation research. 1972. 0aEvaluation research (Social action programs)vEvaluation purpose vEvaluation planning vCollecting data vRandomized experiment vPlanned variations vElevator role vIIMC