下表显示了1997和1998两年速溶咖啡和烘焙咖啡的零售价格和销售量。
(1)利用这些数据,计算烘焙咖啡需求的短期价格弹性,推导烘焙咖啡的线性需求曲线。
(2)计算速溶咖啡需求的短期价格弹性,推导速溶咖啡的线性需求曲线。
(3)哪种咖啡的短期需求弹性大?为什么是这样?
The table below shows the retail price and sales for instant coffee and roasted coffee for 1997 and 1998.
a. Using this data alone, estimate the short-run price elasticity of demand for roasted coffee.Derive a linear demand curve for roasted coffee.
b. Now estimate the short-run price elasticity of demand for instant coffee. Derive a linear demand curve for instant coffee.
c. Which coffee has the higher. short-run price elasticity of demand? Why do you think this is the case?