ECON 203 Lecture Notes - Lecture 24: Natural Monopoly, Market Power, Government Failure

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20 Apr 2016
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Inefficiency can be measured in terms of loss of consumer surplus minus producer surplus. Producer surplus in the long run is the firms profit. Consumer + producer surplus = a measure of benefit to consumers. If either of these are reduced because of inefficiency this is a loss to consumers. Monopolist will produce and maximize output where mr = mc, and charges the price where mc crosses the demand curve. They would set mc = price if this were a perfectly competitive market. The monopoly point on the demand curve is where the x value where mr = Mc, with the y value of the demand curve loss of consumer surplus is from demand curve to y axis (the rectangle/triangle) loss of producer surplus is the rectangle minus the lower triangle. At&t used to own all telephones, telephone lines (they were a monopoly). Then computers came along, government broke at&t up into 6 companies, and then cell phones came along.

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