Demand and supply curves (3)
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1.
Question 1
The demand for a particular product has fallen in recent months. Discuss the extent to which changes in consumer tastes and income could explain this. (12 marks)
Answer:
Introduction: This question requires an analysis of the impact of changes in consumer tastes and income on demand. It should define demand and outline the key concepts related to tastes and income elasticity.
Body:
Conclusion: The extent to which changes in consumer tastes and income explain the fall in demand depends on the specific product and the magnitude of the changes. A strong shift in tastes or a significant change in income elasticity will lead to a substantial decrease in demand. However, other factors can also play a role.
2.
Question 2
Suppose the economy is initially in equilibrium with aggregate demand (AD) at £100 and aggregate supply (AS) at £100.
(a) Explain the short-run impact of a decrease in consumer confidence on the equilibrium price level and real output.
(b) Using the AD-AS diagram, illustrate the effect of this decrease in consumer confidence on the economy.
(c) What are the potential policy options available to the government to address this situation, and what are the likely consequences of each?
Answer 2
(a) A decrease in consumer confidence leads to a reduction in consumer spending, which is a component of aggregate demand. This results in a decrease in overall demand, leading to:
- Equilibrium Price Level: The equilibrium price level will fall. Reduced demand puts downward pressure on prices.
- Real Output: The equilibrium real output (GDP) will also fall. Lower demand leads to reduced production.
(b) The AD-AS diagram illustrates this as a leftward shift in the aggregate demand curve. The new AD curve is to the left of the original. The intersection of the new AD curve with the AS curve determines the new equilibrium price level and real output.
(c) Potential policy options include:
- Expansionary Fiscal Policy: The government could increase its spending or cut taxes to boost aggregate demand. This would shift the AD curve back to the right, increasing both the price level and real output. However, it could lead to increased government debt.
- Expansionary Monetary Policy: The central bank could lower interest rates to encourage borrowing and investment. This would also shift the AD curve back to the right. However, it may be less effective if consumers and businesses are unwilling to borrow, or if the policy is delayed.
- Supply-Side Policies: Policies aimed at increasing the economy's productive capacity (e.g., investment in education, infrastructure, and technology) can shift the AS curve to the right. This can help to increase real output without necessarily causing inflation. However, these policies often have longer-term effects.
3.
Question 3
Consider a market for organic vegetables. Explain, using the law of demand and the law of supply, what would happen to the equilibrium price and quantity if there was a significant increase in the cost of organic farming (e.g., due to new regulations or higher fertilizer prices). Discuss the potential impact on consumers and producers.
Answer 3
Impact of Increased Production Costs:
An increase in the cost of organic farming will shift the supply curve to the left. This is because producers will be less willing to supply the same quantity of organic vegetables at each price level. The law of supply states that as the cost of production increases, the quantity supplied decreases.
Changes in Equilibrium Price and Quantity:
The leftward shift in the supply curve will lead to a new equilibrium with a higher price and a lower quantity. The higher price reflects the increased production costs being passed on to consumers. The lower quantity reflects the reduced willingness of producers to supply organic vegetables at the new, higher price.
Impact on Consumers:
Consumers will face higher prices for organic vegetables. This may reduce consumer purchasing power and lead some consumers to switch to non-organic alternatives. Consumers who are highly value-sensitive may continue to purchase organic vegetables despite the higher price.
Impact on Producers:
Producers will experience lower profits due to the reduced quantity sold and the need to absorb some of the increased production costs. Some producers may be forced to exit the market if they cannot adapt to the higher costs. Producers who are able to innovate and improve efficiency may be better positioned to remain profitable.