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*019  $bl
*035  $a(EXLNZ-47BIBSYS_NETWORK)990209726604702201
*035  $a(NO-LaBS)13979635(bibid)
*035  $a(NO-TrBIB)020972660
*035  $a020972660-47bibsys_network
*040  $aNO-TrBIB$bnob$ekatreg
*24500$aProductivity measurement and the impact of trade and technology on wages :$bestimates for the U.S., 1972-1990
*260  $aCambridge, Mass.$bNBER$c1997
*300  $a49 s.
*4901 $aNBER working paper series$v6052
*7001 $aFeenstra, Robert C.$_28482900
*7001 $aHanson, Gordon H$_25968500
*7102 $aNational Bureau of Economic Research (Forente Stater)$_13074800
*830 0$aWorking paper series (National Bureau of Economic Research : trykt utg.)$x0898-2937$v6052$w999105437124702201$_13074900
*901  $a60
*999  $aoai:nb.bibsys.no:990209726604702202$b2021-11-14T21:08:55Z$z990209726604702202
^