00748nam0 2200217 450 00000499320031013155941.00-262-08263-220031013d1998----km-y0itay50------baengUSGeneral purpose technologies and economic growthedited by Elhanan HelpmanCambridge (Massachusetts)LondonThe Mit press1998cVIII, 315 p.graf. e tab.24 cmCambiamento tecnologico:innovazione, ricerca, sviluppoHelpman,ElhananIT UNIPARTHENOPE RICA UNIMARC000004993NAVA2621/44.1023120031013General purpose technologies and economic growth1206005UNIPARTHENOPE