00347pab a2200133 454500008004000000100002100040245004900061260000900110300001600119362000800135650001500143700002000158773003500178180718b2001   xxu||||| |||| 00| 0 eng d  aGruber, Jonathan  aIs addiction "rational? theory and evidence"  c2001  ap.1261-1303  aNov  aDrug abuse  aKoszegi, Botond  aQuarterly Journal of Economics