Unit 6 Consumer Choice (1)

Unit 6: Consumer Choice Overview

  • Focus on consumer behavior and the decision-making processes related to purchasing and consumption.

  • Key concepts addressed will include utility, preferences, budget constraints, and the effects of changes in income and prices.

Lesson 6.1: Utility and Consumer Behavior

Utility Definition

  • Utility: Satisfaction or happiness gained from consuming goods and services.

Consumption and Utility Relationship

  • How utility directly influences consumption choices.

Consumer Choices

Income Utilization

  • Consumers have two primary options for income use:

    • Consumption of goods and services.

    • Savings for future use.

  • Accumulating savings requires spending less than income.

  • Consuming beyond income necessitates dissaving or borrowing; future consumption must then be reduced to repay debts.

Factors Influencing Purchase Decisions

  1. Desire for Products: Natural inclination towards certain goods.

  2. Relative Value: Importance of products compared to alternatives.

  3. Available Income: Disposable income that can be allocated for purchases.

The Consumer’s Budget

Budget Factors

  1. Income from work and other sources.

  2. Existing savings.

  3. Borrowing capacity.

Valuing Goods and Services

Value Perception

  • Subjective Value: Different consumers assign different values to the same items.

  • Relative Value: Value depends on quantity owned and variety of available goods.

Utility - A Measure of Happiness

  • Utility quantifies the satisfaction derived from consumption.

Total and Marginal Utility

Concepts

  • Total Utility: Overall satisfaction from consuming a quantity of goods, increasing as consumption grows.

  • Marginal Utility: Additional satisfaction gained from consuming one more unit of a good; typically decreases with more consumption (diminishing marginal utility).

  • Consumers reach a point of satiation where additional consumption yields zero marginal utility.

Utility Curve Analysis

  • Slope of the utility function at any point indicates marginal utility.

  • Low quantity of goods means high value; high quantity results in lower perceived value.

Diminishing Marginal Utility

  • Overconsumption can result in negative marginal utility, where additional units decrease overall satisfaction.

  • Not all goods will exhibit negative marginal utility post-satiation.

Deciding to Buy

Decision Factors

  • Consumers assess marginal utility against price.

  • Optimal purchasing occurs when marginal utility per dollar is equal across all goods.

Lesson 6.2: A Model of Consumer Preferences

Preferences and Utility Combinations

  • Combinations of goods can yield varying utility levels, leading to the concept of indifference curves.

Indifference Curves Fundamentals

  • Collections of combinations with the same utility level; consumers are indifferent to choosing among them.

Properties of Indifference Curves

  • All points on an indifference curve yield the same utility.

  • Indifference curves cannot intersect; higher curves reflect higher utility levels.

Marginal Rate of Substitution (MRS)

Definitions

  • MRS: Rate at which consumers are willing to exchange one good for another while maintaining the same utility, reflected as the negative slope of the indifference curve.

Changes in Income and Price

Effects of Income Changes

Increase in Income

  • Expands purchasing capacity for both normal goods.

Decrease in Income

  • Reduces purchasing capacity; normal goods consumption also decreases.

Price Changes Impact

Increase in Price

  • Causes both income and substitution effects leading typically to reduced consumption of the more expensive good and increased consumption of alternatives.

Decrease in Price

  • Results in increased affordability leading consumers to buy more of both goods under normal conditions.

Special Preferences

Perfect Complements

  • Goods consumed in a fixed ratio, yielding unique right-angled indifference curves.

Perfect Substitutes

  • Consumers prioritize lower-priced options, maintaining a linear indifference curve.

Behavioral Economics

Conventional Theories vs. Behavioral Understanding

  • Neo-Classical Economics: Assumes rational behavior and perfect information.

  • Behavioral Economics: Recognizes irrational behaviors influenced by cognitive limitations and biases.

Cognitive Biases Examples

  • Confirmation Bias: Favoring information that aligns with existing beliefs.

  • Overconfidence Effect: Holding overly positive self-assessments on judgments.

  • Hindsight Bias: Misallocating predictive ability post-outcomes.