第1个回答 2015-12-24
In economics, the demand elasticity refers to how sensitive the demand for a good is to changes in other economic variables. Demand elasticity is important because it helps firms model the potential change in demand due to changes in price of the good, the effect of changes in prices of other goods and many other important market factors. A firm grasp of demand elasticity helps to guide firms toward more optimal competitive behavior. Elasticities greater than one are called "elastic," elasticities less than one are "inelastic," and elasticities equal to one are "unit elastic."