TY - JOUR A1 - Cutler, D. A1 - Poterba, J. A1 - Sheiner, L. A1 - Summers, L. T1 - An aging society: opportunity or challenge? Y1 - 1990 DO - 10.2307/2534525 JF - Brookings Papers on Economic Activity VL - 1990 IS - 1 SP - 1 EP - -73 ER -