*001788255 *00520250613174231.0 *007ta *008020430s1999 xxu 000 u eng d *00900809cam a22002177c 4500 *019 $bl *035 $a(EXLNZ-47BIBSYS_NETWORK)990209968024702201 *035 $a(NO-LaBS)13928459(bibid) *035 $a(NO-TrBIB)020996802 *035 $a020996802-47bibsys_network *040 $aNO-TrBIB$bnob$ekatreg *24500$aSocial security in theory and practice (II) :$befficiency theories, narrative theories, and implications for reform *260 $aCambridge, Mass.$bNBER$c1999 *300 $a38 s. *4901 $aNBER working paper series$v7119 *7001 $aMulligan, Casey B.$_22686800 *7001 $aSala-i-Martin, Xavier X.$_22686900 *7102 $aNational Bureau of Economic Research (Forente Stater)$_13074800 *830 0$aWorking paper series (National Bureau of Economic Research : trykt utg.)$x0898-2937$v7119$w999105437124702201$_13074900 *901 $a60 *999 $aoai:nb.bibsys.no:990209968024702202$b2021-11-14T20:50:06Z$z990209968024702202 ^