市场需求弹性 | 武大经济学课

总结于武大经济学课

一：Elasticities

Quantitative Aspects of How Prices Influence Demand or Supply ？

• Questions:
  • Can lower price produce higher revenue to foodstuff? To Thailand rice? To cigarette? To cigarette of Golden Hibiscus?
  • Can depreciation of RMB increase net export of China?Is bumper harvest good for peasants?
  • Who pay the tax levied on cigarette? On cigarette of Golden Lotus?
    The answer depends on responsiveness of sale to price changes.

二：Price Elasticity of Demand 需求的价格弹性

• The concept
  • A measure of responsiveness of quantity demanded to price change
  • The coefficient 系数: the ratio of percentage change in quantity demanded to percentage change in price (ΔQ/Q)/(ΔP/P) = (ΔQ/ ΔP) * P/Q

Fig. 1