00374cam a22000977a 4500008004000000082002300040245010600063260005700169300000900226700004100235180718b1963   xxu||||| |||| 00| 0 eng d  aA2:T1084 N213/1963  aNational Bureau of Economic Research publications, 1921-1963cby National Bureau of Economic Research  aNew YorkbNational Bureau of Economic Researchc1963  a98p.  aNational Bureau of Economic Research