单位弹性的供给:弹性等于1 富于弹性的供给:弹性大于1 Unit Elastic Supply Elastic Supply Elasticity equals 1 Elasticity is greater than 1 价格 供给 Supply 供给 Supply 数 qUantity 200量 Quantity 2.致供给量上升22% leads to a 22% increase in quantity. leads to a 67 increase in quantity. 完全弹性的供给:弹性无穷大 供给弹性的决定因素 Perfectly Elastic Supply Determinants of Elasticity equals infinity Elasticity of Supply ◆卖者改变其生产物品的数量的能力 1.只要价格高于4,供给量无穷大 Ability of sellers to change the amount of the good they produce. supplied is infinite. ◆海滩边的士地是无弹性的 供给 Supply Beach-front land is inelastic ●书箭、汽车或者制成品是富于弹性的 2价格恰好为4,生产者属意供给任散量 ks, cars, or mar ◆时间间隔 Time period apply any quantity ◆在长期,供给更有弹性 elastic in the long ru 3价格低于4,供给量为零 quantity supplied is zero. 计算供给价格弹性 Computing the Price Elasticity 弹性的应用 f Supply Application of Elasticity 用快数量的桌子类给龄价格的白分 ●农事的好消息会不会是农民的坏消息? The price elasticity of supply is computed as Can good news for farming be bad news for farmers the percentage change in the quantity ◆当大学里的农学家们发现了一个比现有品种更高产的新 applied divided by the percentage change in 小变杂交品种时,小麦种植者和小麦市场上会发生什么? What happens to wheat farmers and the market for wheat 供给量变化的百分歌 n that is more productive than existing varieties? Elasticity of supply 供给价格弹性 Percentage Change8 单位弹性的供给：弹性等于1 Unit Elastic Supply - Elasticity equals 1 数量 Quantity 价格 Price 4 1. 价格 $5 上升22％ A 22% increase in price... 100 125 供给 Supply 2. …导致供给量上升22％ leads to a 22% increase in quantity. 富于弹性的供给：弹性大于1 Elastic Supply - Elasticity is greater than 1 数量 Quantity 价格 Price 4 1. 价格 $5 上升22％ A 22% increase in price... 100 200 供给 Supply 2. …导致供给量上升67％ leads to a 67% increase in quantity. 完全弹性的供给：弹性无穷大 Perfectly Elastic Supply - Elasticity equals infinity 数量 Quantity 价格 Price 供给 Supply $4 1. 只要价格高于$4，供给量无穷大 At any price above $4, quantity supplied is infinite. 2. 价格恰好为$4，生产者愿意供给任一数量 At exactly $4, producers will supply any quantity. 3. 价格低于$4，供给量为零 At a price below $4, quantity supplied is zero. 供给弹性的决定因素 Determinants of Elasticity of Supply ‹卖者改变其生产物品的数量的能力 Ability of sellers to change the amount of the good they produce. ‹ 海滩边的土地是无弹性的 Beach-front land is inelastic. ‹ 书籍、汽车或者制成品是富于弹性的 Books, cars, or manufactured goods are elastic. ‹时间间隔 Time period. ‹在长期，供给更有弹性 Supply is more elastic in the long run. 计算供给价格弹性 Computing the Price Elasticity of Supply 用供给量变化的百分数除以价格变化的百分 数，就算出来了供给的价格弹性。 The price elasticity of supply is computed as the percentage change in the quantity supplied divided by the percentage change in price. Elasticity of Supply = Percentage Change in Quantity Supplied Percentage Change in Price Elasticity of Supply = Percentage Change in Quantity Supplied 供给价格弹性 Percentage Change 供给量变化的百分数 价格变化的百分数 弹性的应用 Application of Elasticity ‹农事的好消息会不会是农民的坏消息？ Can good news for farming be bad news for farmers? ‹当大学里的农学家们发现了一个比现有品种更高产的新 小麦杂交品种时，小麦种植者和小麦市场上会发生什么？ What happens to wheat farmers and the market for wheat when university agronomists discover a new wheat hybrid that is more productive than existing varieties?