Consumer choice

Welcome to the world of microeconomics! In this foundational episode, we explore the theory of consumer choice—the engine that drives the demand side of the economy. Why do you buy a coffee instead of a tea, or choose one brand over another? We'll break down the decision-making process by introducing the core concepts of utility (satisfaction), budget constraints (what you can afford), and indifference curves (what you prefer). Learn how economists model rational choice to understand how individuals maximize their happiness in a world of scarcity, setting the stage for everything else we will explore in this course.

Check your understanding

These are the same multiple-choice questions you will see in the Quiz section after you listen to the episode. Use them here to preview or review the answers.

The 'law of diminishing marginal utility' states that...

  1. The total satisfaction from consuming a good always decreases.
  2. The price of a good falls as you buy more of it.
  3. The extra satisfaction gained from consuming one more unit of a good tends to decrease as consumption increases.
  4. Consumers prefer to have less of a good than more of it.
  5. All goods provide the same amount of satisfaction.

In the theory of consumer choice, what does a consumer's budget constraint represent?

  1. The consumer's total satisfaction or utility.
  2. The different combinations of two goods that give the consumer equal satisfaction.
  3. The consumer's preferences for different goods.
  4. The minimum amount of goods a consumer must buy.
  5. All the possible combinations of two goods a consumer can purchase given their income and the prices of the goods.

What is the defining characteristic of an indifference curve?

  1. It shows all the combinations of goods that can be bought for a certain price.
  2. Every point on the curve represents a combination of goods that provides the consumer with the same level of utility.
  3. It is always a straight line.
  4. Higher indifference curves represent lower levels of satisfaction.
  5. It shows the relationship between the price of a good and the quantity demanded.

The optimal consumption choice for a rational consumer occurs at the point where...

  1. The budget constraint intersects the vertical axis.
  2. Two indifference curves cross each other.
  3. The consumer spends all their money on only one good.
  4. The budget constraint is tangent to the highest attainable indifference curve.
  5. The marginal utility for all goods is zero.

Which of the following are standard properties of indifference curves in consumer theory?

  1. They are upward sloping.
  2. They are bowed inward (convex to the origin).
  3. Higher curves represent lower levels of utility.
  4. Indifference curves frequently cross.
  5. They are downward sloping.

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