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*035  $a(NO-LaBS)14824007(bibid)
*035  $a(NO-TrBIB)021009368
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*040  $aNO-TrBIB$bnob$ekatreg
*24500$aEstimating the return to schooling :$bprogress on some persistent econometric problems$cDavid Card
*260  $aCambridge, Mass.$bNBER$c2000
*300  $a43, [3] s.
*4901 $aNBER working paper series$v7769
*7001 $aCard, David$_16239500
*7102 $aNational Bureau of Economic Research (Forente Stater)$_13074800
*830 0$aWorking paper series (National Bureau of Economic Research : trykt utg.)$x0898-2937$v7769$w999105437124702201$_13074900
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*999  $aoai:nb.bibsys.no:990210093684702202$b2021-11-14T20:26:56Z$z990210093684702202
^