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Monopoly Monopoly:Monopoly: Why?Why? Natural monopoly (increasing returns to scale),), e.gg. (p(parts of)) utilityy companies? ArtificialArtificial monopolymonopoly –a patent; e.g. a new drug –sole ownership of a resource; e.g. a toll bridge –formation of a cartel; e.g. OPEC Monopoly:Monopoly: AssumptionsAssumptions Many buyers OnlyOnly oneone sellerseller ii.ee. notnot aa ppricerice-takertaker (Homogeneous product) Perfect information RestrictedRestricted entryentry (and(and possiblypossibly exit)exit) Monopoly:Monopoly: FeaturesFeatures The monoppolist’s demand curve is the (downward sloping) market demanddemand curvecurve The monopolist can alter the market price by adjusting its output level.
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