00670nam0 22002411i 450 99000732402040332120181026110843.0000732402FED01000732402(Aleph)000732402FED0100073240220021010d1989----km-y0itay50------baengEfficiency competition and policyHarold Demsetzs.l.Blackwell1989Demsetz,Harold<1930- >116461ITUNINARICAUNIMARCBK990007324020403321XV H1 18910079DTEDTEEfficiency, competition, and policy712759UNINA