Microeconomics: Theory of Consumer Behaviour · Class 11 · CBSE · Commerce Economics

Explain how a fall in the price of a commodity affects a consumer's budget set, assuming income and the price of the other commodity remain unchanged.

Practice question from Microeconomics: Theory of Consumer Behaviour (Class 11 · CBSE · Commerce Economics), with the correct answer and a step-by-step solution.

medium · Subjective · Q-C88064

Explain how a fall in the price of a commodity affects a consumer's budget set, assuming income and the price of the other commodity remain unchanged.

Answer: A fall in the price of one commodity increases the consumer's purchasing power. The budget line rotates outward from the intercept of the commodity whose price has not changed, while the intercept for the cheaper commodity moves farther from the origin. Consequently, the consumer can afford more combinations and may change the quantity demanded of both commodities.

Solution

When the price of one commodity falls, the maximum quantity of that commodity affordable with given income rises. Since the other commodity's price and income are unchanged, its intercept remains fixed, causing the budget line to rotate outward.

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