00288nam a2200121Ia 4500020001500000082002000015100001900035245004700054260002800101300002700129500000500156700000500161  a0631219773  a338.6bSt881.ET  aStoneman, Paul  aThe economics of technological diffusionb  aOxfordbBlackwellc2002  aix, 317p. Bibl. Index.  a  a