00357pab a2200121 454500008004000000100002100040245009000061260000900151300001200160362000800172650002000180773003500200180718b2007   xxu||||| |||| 00| 0 eng d  aFinkelstein, Amy  aThe aggregate effects of health insurance: evidence from the introduction of medicare  c2007  ap.1-37.  aFeb  aSocial security  aQuarterly Journal of Economics