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*019  $bl
*035  $a(EXLNZ-47BIBSYS_NETWORK)990209726104702201
*035  $a(NO-LaBS)13414376(bibid)
*035  $a(NO-TrBIB)02097261x
*035  $a02097261x-47bibsys_network
*040  $aNO-TrBIB$bnob$ekatreg
*24504$aThe effect of welfare payments on the marriage and fertility behavior of unwed mothers :$bresults from a twins experiment
*260  $aCambridge, Mass.$bNBER$c1997
*300  $a31, [14] s.
*4901 $aNBER working paper series$v6047
*7001 $aBronars, Stephen G$_25085400
*7001 $aGrogger, Jeff$_16521600
*7102 $aNational Bureau of Economic Research (Forente Stater)$_13074800
*830 0$aWorking paper series (National Bureau of Economic Research : trykt utg.)$x0898-2937$v6047$w999105437124702201$_13074900
*901  $a60
*999  $aoai:nb.bibsys.no:990209726104702202$b2021-11-14T19:45:38Z$z990209726104702202
^