Summary
Highlights
Price discrimination is when a firm charges different prices to different consumers for an identical good or service without any differences in the cost of production. This practice requires three conditions: the firm must have price-making ability (monopoly power), information to segment the market based on price elasticity of demand (PED), and the ability to prevent resale of the good or service.
First-degree price discrimination occurs when consumers are charged the exact price they are willing and able to pay, effectively eroding all consumer surplus and turning it into monopoly profit. This is considered a highly exploitative form of price discrimination.
Second-degree price discrimination, often seen as 'excess capacity pricing,' applies to firms with fixed capacity (e.g., airlines, hotels). These firms lower prices last minute to fill idle capacity and contribute to fixed costs. This can benefit some consumers with lower prices, leading to a gain in consumer surplus for those who purchase last-minute deals.
Third-degree price discrimination involves segmenting the market into different groups based on their price elasticities of demand (PED), such as commuters vs. leisure travelers for a rail company. Firms charge higher prices to consumers with inelastic demand and lower prices to those with elastic demand, maximizing joint profits. This often occurs based on time differences, age, income, or geography.
The main con of price discrimination is allocative inefficiency, leading to prices far exceeding marginal cost and exploiting consumers, especially those with inelastic demand. It can also exacerbate income inequality and be anti-competitive. However, potential pros include greater reinvestment and dynamic efficiency from increased profits, economies of scale from higher quantities, and some consumers benefiting from lower prices (e.g., in second and elastic segments of third-degree discrimination). Cross-subsidization of loss-making services is another potential benefit, but the overall negative impact on consumers, particularly the allocative inefficiency, often outweighs the benefits.