Price elasticity of supply measures the responsiveness of quantity supplied to a change in price. 供应的价格弹性衡量的是供应量对价格变化的反应能力。

The price elasticity of supply (PES) is measured by % change in Q.S divided by % change in price. 供应的价格弹性（PES）是由Q.S的百分比变化除以价格的百分比变化来衡量。

If the price of a cappuccino increases by 10%, and the supply increases by 20%. We say the PES is 2.0. 如果一杯卡布奇诺的价格增加10%，而供应量增加20%。我们说PES是2.0。If the price of bananas falls 12% and the quantity supplied falls 2%. We say the PES = 2/12 = 0.16 如果香蕉的价格下降12%，供应量下降2%。我们说PES=2/12=0.16Inelastic supply 无弹性供应 – a change in price causes a smaller proportional change in quantity supply 价格的变化导致供应量的较小比例变化Elastic supply 弹性供应 – a change in price causes a bigger proportional change in supply 价格的变化导致供应量的较大比例变化

Inelastic supply 无弹性供应

This means that an increase in price leads to a smaller % change in supply. Therefore PES