在经济学中,把某种变量对另一变量变化的反映程度称为弹性或弹性系数,因此函数的弹性是为了考察相对变化而引入的.在经济分析中,借用弹性概念来描述一个经济变量变动百分之一时,另一个经济变量变动了百分之几.%In economics, the reflection degree of some variables to another variables is called elasticity or elastic coefficient, therefore function flexibility is introduced for surveying the relative change.In the economic analysis, we described an economic variable change 1％, and another economic variable change several percents by elasticity concept.
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