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*019  $bl
*035  $a(EXLNZ-47BIBSYS_NETWORK)990209937144702201
*035  $a(NO-LaBS)13978041(bibid)
*035  $a(NO-TrBIB)020993714
*035  $a020993714-47bibsys_network
*040  $aNO-TrBIB$bnob$ekatreg
*24504$aThe pre-program earnings dip and the determinants of participation in a social program :$bimplications for simple program evaluation strategies
*260  $aCambridge, Mass.$bNBER$c1999
*300  $a41, [27] s.
*4901 $aNBER working paper series$v6983
*7001 $aHeckman, James J.$_26741100
*7001 $aSmith, Jeffrey A.$_34572900
*7102 $aNational Bureau of Economic Research (Forente Stater)$_13074800
*830 0$aWorking paper series (National Bureau of Economic Research : trykt utg.)$x0898-2937$v6983$w999105437124702201$_13074900
*901  $a60
*999  $aoai:nb.bibsys.no:990209937144702202$b2021-11-14T20:10:23Z$z990209937144702202
^