The Theory of Price Discrimination

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The modern theory of price discrimination began with the work of Arthur Cecil Pigou (1877- 1959) and is defined by Machlup (1955): "Price discrimination may be defined as the practice of a firm or group of firms of selling (leasing) at prices disproportionate to the marginal costs of the products sold (leased) or of buying (hiring) at prices disproportionate to the marginal productivities of the factors bought (hired)". But in simpler terms, "price discrimination is often defined as charging different customers different prices for the same or highly similar offering" (Smith, 2004). The motive behind this is to increase profit by reducing consumer surplus. If the same price is charged to all consumers, some potential revenue is lost since some of the consumers would have been prepared to pay more. But before answering the question of whether firms should price discriminate or not, we will have to distinguish between the various types of price discrimination and before that it is important to note that there are three necessary conditions for a firm to practise price discrimination, namely, the firm must be a price maker, the elasticity of demand must be different in the different markets and finally, the market must be clearly separated. To begin with, the extent to which the monopolist can grab consumer surplus, which is "the extra satisfaction or utility gained by consumers from paying an actual price for a good that is lower than that they would have been prepared to pay"(Davies, Lowes and Pass, 2000), is referred to as the degree of price discrimination and there exists three degrees of price discrimination: first degree, second degree and third degree price discrimination. "First-degree price discrimination occurs when the sell... ... middle of paper ... ...e domestic market. Now, after having explained the various types of price discrimination, we can tackle the question of whether firms should price discriminate or not. This can be done by analyzing the benefits and drawbacks of price discrimination on firms as well as on consumers and society. So, first of all, as already mentioned above, firms should price discriminate in order to increase their revenue and consequently profits as price discrimination allows them to capture consumer surplus. In addition, first price discrimination (perfect price discrimination) brings economic efficiency since it eliminates deadweight loss which is "the reduction in consumer's surplus and producer's surplus that results when the output of a product is restricted to less than the optimum efficient level that would prevail under perfect competition" (Davies, Lowes and Pass, 2000).

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