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*1001 $aAngrist, Joshua D.$0(NO-TrBIB)90840716$_33075300
*24510$aDoes teacher testing raise teacher quality? :$bevidence from state certification requirements$cJoshua Angrist, Jonathan Guryan
*260  $aCambridge, Mass.$bNational Bureau of Economic Research$c2003
*300  $a20, [7] s.$ctab.
*4901 $aWorking paper series / National Bureau of Economic Research$v9545
*7001 $aGuryan, Jonathan$0(NO-TrBIB)2091890$_46105300
*830 0$aWorking paper series (National Bureau of Economic Research : trykt utg.)$x0898-2937$v9545$w999105437124702201$_13074900
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