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*1001 $aJacob, Brian A.$0(NO-TrBIB)2057912$_30576300
*24510$aAre idle hands the devil's workshop? :$bincapacitation, concentration and juvenile crime$cBrian A. Jacob, Lars Lefgren
*260  $aCambridge, Mass.$bNational Bureau of Economic Research$c2003
*300  $a52 s.$bill.
*4901 $aWorking paper series / National Bureau of Economic Research$v9653
*7001 $aLefgren, Lars$0(NO-TrBIB)2057910$_30576400
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