我国城镇居民商品需求价格弹性的估计

Estimation of Elasticity of Commodity Demand and Price of Urban Inhabitants of China

通过将消费率变量引入到弗里希的需求价格弹性估计方法中,经过数理推导,获得了需求价格弹性估计的方程组。研究发现:就需求自价格弹性而言,商品需求受自身价格的影响程度最大,而受其他商品价格的影响程度较小。随着收入组等级提高,商品需求对其价格变化的反映更为敏感。就需求交叉价格弹性而言,食品价格对其他商品的影响程度最大。随着收入等级提高,食品价格对其他商品的影响程度不断下降。

Adding ratio of consumption into the method of Frisch estimation of elasticity of demand and price, and by mathematical derivation, wederive a group of equation of the estimation of elasticity of demand and price. The research shows： As far as the self elasticity of demand and price is concerned, the self price of commodity has the most impact on its own demand, and the other price of commodity has less impact. As the increase of the rank of income, the sensitive of the demand of commodity to its price change is more and more obvious. As far as the cross elasticity of demand and price is concerned, the price of food has the most impact on it＇s the other commodity. As the increase of the rank of income, the level of impact of food price to the other commodity has less and less implication.