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*035  $a(NO-LaBS)14156915(bibid)
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*1001 $aHeckman, James J.$0(NO-TrBIB)90276251$_26578800
*24510$aLearning-by-doing vs. on-the-job training :$busing variation induced by the EITC to distinguish between models of skill formation$cJames J. Heckman, Lance Lochner, Ricardo Cossa
*260  $aCambridge, Mass.$bNational Bureau of Economic Research$c2002
*300  $a40, [24] s.
*4901 $aWorking paper series / National Bureau of Economic Research$v9083
*7001 $aCossa, Ricardo$0(NO-TrBIB)2091866$_46089700
*7001 $aLochner, Lance$0(NO-TrBIB)2040589$_35520400
*830 0$aWorking paper series (National Bureau of Economic Research : trykt utg.)$x0898-2937$v9083$w999105437124702201$_13074900
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*999  $aoai:nb.bibsys.no:990221095604702202$b2021-11-14T19:57:42Z$z990221095604702202
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