chapter 10

Chapter 10: Custom Consumer Choice and Behavioral Economics

1. Utility and Consumer Decision Making

• Definition of Utility:

  • Utility refers to the enjoyment or satisfaction derived from consuming goods and services.

  • Economists analyze consumer choices in order to understand economic behavior.

  • Consumers are assumed to be rational, aiming to maximize their utility with limited resources.

• Marginal Utility:

  • The change in total utility when consuming one additional unit of a good or service is called marginal utility.

  • Marginal utility typically decreases as consumption increases — a phenomenon known as the Law of Diminishing Marginal Utility.

  • Example: The first slice of pizza brings great satisfaction, but the satisfaction from additional slices may decline.

2. Demand Curves

• Understanding Demand Curves:

  • Demand curves illustrate how the quantity demanded of a good changes based on its price.

  • As prices decrease, the quantity demanded typically increases due to the Income Effect and Substitution Effect:

    • Income Effect: When prices fall, consumers feel wealthier and may buy more of the good.

    • Substitution Effect: When prices fall, the good becomes relatively cheaper compared to alternatives, prompting consumers to buy more of it.

• Illustrating Demand Curves:

  • Individual demand curves can be derived by analyzing consumer behavior at different price points. The market demand curve is created by adding individual demand curves together.

3. Social Influences on Decision Making

• Effects of Social Influences:

  • Consumer choices are often influenced by the decision-making of others rather than being made independently.

  • Examples of social influences include:

    • Celebrity Endorsements: Consumers may trust products endorsed by celebrities, believing they have expertise.

    • Network Externalities: The value of a product increases as more people use it, affecting decisions.

4. Behavioral Economics

• Definition of Behavioral Economics:

  • This field studies situations where consumer behavior deviates from classical economic predictions emphasizing rationality.

  • Three identified common mistakes consumers make:

    • Ignoring non-monetary costs while focusing on monetary ones.

    • Failing to account for sunk costs in decision-making.

    • Being unrealistic about future behavior.

• Sunk Costs and Decision Making:

  • A sunk cost is an expense that cannot be recovered.

  • Consumers often irrationally let sunk costs affect their future decision making.

• Consumer Behavior in Shopping:

  • Behavioral economics suggests consumers often use rules of thumb that do not always lead to optimal decisions.

  • Irrelevant information can weigh heavily on decisions, demonstrating inconsistent consumer behavior.

Summary

This chapter encompasses how utility influences consumer choices, the origins of demand curves, the impact of social factors in decision-making, and the insights from behavioral economics, which challenge traditional assumptions of rational consumer behavior.