Price Discrimination under Monopoly

First-degree price discrimination charges each consumer their maximum willingness to pay, like in auction houses. Second-degree discrimination charges different prices based on quantity purchased, such as bulk discounts. Third-degree discrimination segments markets by demographic factors like age or location, charging different prices to each segment, as seen with student movie discounts.

First-degree price discrimination allows monopolists to capture all consumer surplus by charging each customer their maximum willingness to pay for each unit. This requires detailed knowledge of individual preferences. Auction houses exemplify this strategy, where buyers bid based on their maximum willingness to pay, enabling sellers to extract maximum profit from every transaction.

Three conditions enable effective price discrimination: the firm must have market power to set prices independently, the ability to separate markets or customers to prevent resale, and different price elasticities of demand among customer groups. Without these conditions, customers could arbitrage price differences, undermining the strategy's effectiveness.

Second-degree discrimination offers different prices based on quantity or product version without knowing individual willingness to pay explicitly; customers self-select into categories. Third-degree discrimination segments consumers by observable characteristics like age or location and charges each group a different price. Third-degree is the most common form in practice.

Third-degree price discrimination appears in telecommunications, where companies charge different rates for various data plans based on usage. Movie theaters offer student discounts, and restaurants provide senior citizen discounts. These strategies segment markets by demographic factors and charge different prices to each segment, allowing businesses to capture additional consumer surplus.

Price discrimination can raise ethical concerns and face legal restrictions if it results in unfair or discriminatory practices. While the strategy enables businesses to maximize profits by extracting consumer surplus, regulators may intervene through public policy toward monopolies antitrust laws to prevent practices that harm consumers or reduce market competition.

Second-degree price discrimination does not require knowledge of each customer's willingness to pay. Instead, it offers different prices for quantities or product versions, allowing customers to self-select based on their preferences and consumption patterns. Bulk buying discounts and premium product versions exemplify this approach, where customers reveal their preferences through their purchasing choices.