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*24500$aForward and backward intergenerational goods :$ba theory of intergenerational exchange$cAntonio Rangel
*260  $aCambridge, Mass.$bNBER$c2000
*300  $a34 s.
*4901 $aNBER working paper series$v7518
*7001 $aRangel, Antonio$_40779500
*7102 $aNational Bureau of Economic Research (Forente Stater)$_13074800
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