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*24504$aThe progressivity of social security$cJulia Lynn Coronado, Don Fullerton, Thomas Glass
*260  $aCambridge, Mass.$bNBER$c2000
*300  $a27, [19] s.
*4901 $aNBER working paper series$v7520
*7001 $aCoronado, Julia Lynn$_56561600
*7001 $aFullerton, Don$_37426700
*7001 $aGlass, Thomas$_56561700
*7102 $aNational Bureau of Economic Research (Forente Stater)$_13074800
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