食品价格上涨对不同收入等级城镇居民消费行为与福利的影响——基于QUAIDS模型的研究

Research on the Effects of Food Price Rise on the Consumption Behavior and Welfare of Urban Residents Based on QUAIDS Model

本文利用2007年中国居民收入调查数据(CHIPS),运用二次几乎完美需求系统(QUAIDS)模型和补偿变量法,实证分析了食品价格上涨对不同收入等级城镇家庭消费行为与福利的影响。结果表明,面对食品价格上涨,低收入家庭倾向于维持原有食品消费数量而减少其它商品消费数量。而高收入家庭倾向于减少一些高档食品消费而维持其他商品消费数量。另外,食品价格上涨对低收入家庭福利的影响程度高于高收入家庭,以食品价格上涨20%为例,低收入家庭福利损失9.05%,而高收入家庭福利损失仅仅为5.91%。因此,政府要充分考虑到低收入家庭在面临食品价格上涨时所表现出的脆弱性进而制定相应的福利政策,以帮助低收入群体抵御食品价格上涨的影响。

In this paper we employs a quadratic almost ideal system （QUAIDS） and the methodology of compensated vari ation to analyze the effects of food price rise to the consumption behavior and welfare of different income level urban resi- dents, by using Chinese Household Income Projects （CHIPS）data. The results show that the low-income families tend to sustain the original quantity of food consumption and reduce other commodities consumption, and the high-income fami lies are prone to cut down some luxury food in order to retain the quantity of other goods consumption. The results also show that the welfare effects of the low-income families derived from the increase of food prices are much higher than that of the high-income families. For example, if food prices had risen by 20% ,the low-income families would get 9.05% welfare losses, whereas the high-income familiesg losses on welfare would only reach 5.91%. Therefore, the government should consider fully the facts and make appropriate welfare policy to help the low-income families to resist from the ris ing prices.