If the quantity demanded of beef increases by 5% when the price of chicken increases by 20%, the cross-price elasticity of deman

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问题 If the quantity demanded of beef increases by 5% when the price of chicken increases by 20%, the cross-price elasticity of demand between beef and chicken is______.

选项 A、-0.25
B、0.25
C、-4
D、4

答案B

解析 答案为B项。cross—price elasticity of demand“需求的交叉弹性”,即一种物品价格变动所引起的另一种物品需求变动的大小,计算公式为一种物品需求变动的百分比除以另一种物品价格变动的百分比。两种互补品的价格与需求反方向变动,其需求交叉弹性系数为负数;两种替代品的价格与需求同方向变动,其需求交叉弹性系数为正数。本题经过计算,交叉弹性为+5%/+20%=0.25,故选B项。
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