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*24500$aWhy do temporary help firms provide free general skills training?$cDavid H. Autor
*260  $aCambridge, Mass.$bNBER$c2000
*300  $a45, [14] s.
*4901 $aNBER working paper series$v7637
*7001 $aAutor, David H.$_76166300
*7102 $aNational Bureau of Economic Research (Forente Stater)$_13074800
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