需求與供應(二):彈性
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In the above diagram, DD is a demand curve. In the price range P1 to P2, the elasticity of demand
Which of the following would increase the elasticity of demand of the transport service of the Mass Transit Railway (MTR)?
Refer to the following straight line demand curve DD.

Point A is the mid-point of the demand curve DD. If the unit price increases from $8 to P, the total revenue
The government has imposed a fee for using the emergency services provided by public hospitals. As a result, patients’ total expenditure on private medical services
A market researcher reports to the manager of a company, “Even if we cut prices to boost sales, the sales revenue will remain unchanged because of the elasticity of demand of our product.”
According to the market researcher, their product’s elasticity of demand is
After a good harvest, the price of choi-sum has changed by 50% and the quantity transacted has changed by 40%. Which of the following statements is/are correct?
Suppose there is a technological advance in the production of a normal good. In which of the following situations may the market price of the good remain unchanged?

In the above diagram, when the price P1 increases to P2,
It became more difficult to find a metered car parking space by the roadside after the fee for a parking space was reduced from $4 to $2 for every 15 minutes. It was also reported that the fee in a car park remained at $15 per hour.
Which of the following about the effect on metered car parking by the roadside is correct?
The demand elasticity of good X is 1.2. After a decrease in supply, the equilibrium quantity drops by 30%. The equilibrium price would _________ by _______.