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*035  $a(EXLNZ-47BIBSYS_NETWORK)990210106334702201
*035  $a(NO-LaBS)13961763(bibid)
*035  $a(NO-TrBIB)021010633
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*040  $aNO-TrBIB$bnob$ekatreg
*24500$aIdentifying the role of cognitive ability in explaining the level of and change in the return to schooling$cJames Heckman, Edward Vytlacil
*260  $aCambridge, Mass.$bNBER$c2000
*300  $a31, [14] s.
*4901 $aNBER working paper series$v7820
*7001 $aHeckman, James$_47952900
*7102 $aNational Bureau of Economic Research (Forente Stater)$_13074800
*830 0$aWorking paper series (National Bureau of Economic Research : trykt utg.)$x0898-2937$v7820$w999105437124702201$_13074900
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*999  $aoai:nb.bibsys.no:990210106334702202$b2021-11-14T20:25:08Z$z990210106334702202
^