The interaction of demand and supply：练习题

If the price of a substitute good (Good Y) falls while the cost of raw materials used to produce Good X also falls, what will be the certain effect on the equilibrium in the market for Good X?

A sudden increase in the price of wheat leads to a rise in the price of bread. This higher price acts as a signal to farmers to allocate more land to wheat production and as a rationing device for consumers. Which function of the price mechanism is primarily responsible for the reallocation of resources toward wheat?

A government decides to set a maximum price (price ceiling) below the current market equilibrium for bread. In a demand and supply diagram, what would be the immediate result of this intervention?

In the market for electric vehicles, two events occur simultaneously: there is a significant technological breakthrough in battery production and a major increase in the price of petrol. In a demand and supply diagram, what can be concluded about the new equilibrium price and quantity?

Consider a market where demand increases (shifts right) due to a rise in consumer income, while supply decreases (shifts left) due to an increase in the cost of production. If the magnitude of the shift in supply is significantly greater than the magnitude of the shift in demand, what will happen to the equilibrium price and quantity?

Consider a market for smartphones where the demand and supply curves are given by:
\(Q_d = 100 - 2P\)
\(Q_s = -20 + 2P\)
Suppose the government introduces a technological subsidy that shifts the supply curve to \(Q_s = 20 + 2P\). Calculate the change in the equilibrium price and explain how this shift affects the consumer surplus in the market.

In the market for a specific agricultural product, assume the initial supply and demand are in equilibrium. If the government provides a fixed unit subsidy to producers while simultaneously a new medical study significantly reduces consumer preferences for the product, analyze the indeterminable effect on the new equilibrium quantity.

A local market for organic coffee is in equilibrium. Suppose two events occur simultaneously: first, a new health report highlights the significant long-term benefits of organic coffee consumption; second, a major coffee-producing region experiences a severe drought that destroys a large portion of the harvest.

(a) Explain, using a demand and supply diagram, the effect of these two events on the equilibrium price and equilibrium quantity of organic coffee. [4]
(b) Discuss whether the final impact on the equilibrium quantity can be determined with certainty if the specific magnitudes of the shifts are unknown. [1]