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Thousands of Britain’s ‘Fish and Chip’ Shops Could Close Within a Year

Customers expect fish and chips to be cheap. A year ago, the average price for a regular fish supper was £7. Now it’s £8.50—a 21% increase. Prices on average rose 7% in the last year.—CNN Business

Answer the following questions to check your understanding of the story.

Maggie buys fish suppers and other goods and services. Given the price changes in the news clip and no change in Maggie’s income, what do we know about Maggie’s budget line if she measures fish suppers on the x-axis?

The price of fish suppers rises so when Maggie buys only fish suppers, she can buy fewer than before the price rise. The price of other goods and services also rises so if Maggie buys only other goods and services, she can buy fewer than before the price rise. How do the intercepts of Maggie’s budget line change? The price of fish suppers rises by more than the price of other goods and services rises, so the relative price of fish suppers increases. What happens to the slope of Maggie’s budget line?

The price of fish suppers rises so when Maggie buys only fish suppers, she can buy fewer than before the price rise. The price of other goods and services also rises so if Maggie buys only other goods and services, she can buy fewer than before the price rise. The -axis intercept and the y-axis intercept of her budget line decrease. The price of fish suppers rises by more than the price of other goods and services rises, so the relative price of fish suppers increases, and her budget line becomes steeper.

For Maggie, fish suppers are a normal good. When the price rises, how does her best affordable choice change?

If the price of a fish supper rises and we hypothetically increase Maggie’s income to keep her on the same indifference curve, is the substitution effect an increase or a decrease in the number of fish suppers she buys? If we decrease Maggie’s income back to its starting value, does Maggie move to a different indifference curve? Fish suppers are a normal good, so is the income effect an increase or a decrease in fish suppers?

If the price of a fish supper rises and we hypothetically increase Maggie’s income to keep her on the same indifference curve, her substitution effect is a decrease in the quantity of fish suppers she buys. If we then decrease her income back to its starting value, Maggie moves to a lower indifference curve and her income effect is a decrease in the quantity of fish suppers she buys because fish suppers are a normal good.

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