00425pab a2200133 454500008004000000100001800040245011200058260000900170300001400179362001100193650002400204700002100228773004200249180718b2008   xxu||||| |||| 00| 0 eng d  aJeon, Yongbok  aPuzzles, paradoxes, and regularities: cyclical and structural productivity in the United States (1950-2005)  c2008  ap.237-43.  aSummer  aLabour productivity  aVernengo, Matias  aReview of Radical Political Economics