Question

Семья купила в прошлом году 100 кг мяса. Ценовая эластичность спроса на мясо равна: -1; эластичность спроса по доходу: +2; перекрестная эластичность спроса между мясом и рыбой: +3. Как изменится потребление мяса в текущем году, если цена на мясо поднялась на 20 %, цена на рыбу снизилась на 10 %, а совокупный доход семьи возрос на 50 %.

Answer 1

У всех остальных доход вырос -15%

Answer 2

Calculation of Changes in Meat Consumption

To calculate the changes in meat consumption based on the given information, we need to consider the price elasticity of demand for meat, the income elasticity of demand, and the cross-price elasticity of demand between meat and fish.

The price elasticity of demand measures the responsiveness of quantity demanded to changes in price. A price elasticity of demand of -1 indicates that a 1% increase in price will result in a 1% decrease in quantity demanded.

The income elasticity of demand measures the responsiveness of quantity demanded to changes in income. An income elasticity of demand of 2 indicates that a 1% increase in income will result in a 2% increase in quantity demanded.

The cross-price elasticity of demand measures the responsiveness of quantity demanded of one good to changes in the price of another good. A cross-price elasticity of demand of 3 indicates that a 1% increase in the price of fish will result in a 3% increase in the quantity demanded of meat.

Based on these elasticities, we can calculate the changes in meat consumption in the current year.

Changes in Meat Consumption Calculation:

1. Price Change: Meat price increased by 20%. - The price elasticity of demand for meat is -1. - Therefore, the quantity demanded of meat will decrease by 20% (the same percentage as the price increase) [[1]].

2. Fish Price Change: Fish price decreased by 10%. - The cross-price elasticity of demand between meat and fish is 3. - Therefore, the quantity demanded of meat will increase by 30% (3 times the percentage change in fish price) [[2]].

3. Income Change: Family income increased by 50%. - The income elasticity of demand for meat is 2. - Therefore, the quantity demanded of meat will increase by 100% (2 times the percentage change in income) [[3]].

Summary of Changes in Meat Consumption:

Based on the calculations above, the changes in meat consumption in the current year are as follows:

- Quantity demanded of meat will decrease by 20% due to the 20% increase in meat price. - Quantity demanded of meat will increase by 30% due to the 10% decrease in fish price. - Quantity demanded of meat will increase by 100% due to the 50% increase in family income.

Please note that these calculations are based on the given elasticities and assume that there are no other factors influencing meat consumption.

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