00322pab a2200121 454500008004000000100001800040245006400058260000900122300001200131362000900143650002100152773002700173180718b1990   xxu||||| |||| 00| 0 eng d  aGoraski, P.A.  aInnovation, technological opportunity, and market structure  c1990  a586-602  aJul.  aMarketing - U.K.  aOxford Economic Papers