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*1001 $aGordon, Robert J.$d1940-$0(NO-TrBIB)90098488$_33952900
*24510$aFive puzzles in the behavior of productivity, investment, and innovation$cRobert J. Gordon
*260  $aCambridge, Mass.$bNational Bureau of Economic Research$c2004
*300  $a59, [5] s.$bill.
*4901 $aWorking paper series / National Bureau of Economic Research$v10660
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