Robert H. Frank,
Cornell University
Ian C. Parker,
University of Toronto
| Arbitrage | The purchase of something for costless risk-free resale at a higher price.
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| Hurdle model of price discrimination | Price discrimination using an obstable that must be surmounted to become eligible for a discount price.
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| Monopoly | A market served by a single seller of a product with no close substitutes.
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| Natural monopoly | A market that can be served at lowest cost by a single supplier.
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| Optimality condition for a monopolist | A monopolist maximizes profit by choosing the level of output where marginal revenue equals marginal cost.
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| X-inefficiency | A condition in which a firm fails to obtain maximum output from a given combination of inputs.
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