需求价格弹性应用中的一个约束条件

A restrained condition in the application of the price elasticity of demand

需求价格弹性在经济理论的定量分析中具有广泛的应用性。商品价格的变化对总收益的影响取决于该商品需求价格弹性的大小 ,即对需求富有弹性的商品涨价会减少总收益 ,降价会增加总收益 ;而对需求缺乏弹性的商品 ,涨价会增加总收益 ,降价会减少总收益。但需求价格弹性与总收益的这种关系有一定条件约束 ,不满足这个约束条件 ,需求价格弹性与总收益之间就不具有如上关系。

There is widespread application of the price elasticity of demand in the quantitative analysis of economical theory.The effect on the total revenue of a goods made by the price variation depends on the degree of its price elasticity of demand.That is:the total revenue may be decreased if the price of a elastic demand goods is raised ,and vice versa.And the total revenue can be increased if the price of a inelastic demand goods is raised,and vice versa.But the relation between the price elasticity and total revenue is restrained under a certain condition.If the requirements of the condition can not be satisfied,there can't exist that relation between them.In this paper the authormainly brings out the restrained condition.