食品消费的几乎理想需求系统分析

摘要

利用几乎理想系统(AIDS)对河南城镇居民的食品消费状况进行了系统分析，建立了几乎理想需求系统模型，并在此基础上进行了需求支出弹性和需求价格弹性(自价格弹性和交叉价格弹性)分析，结果表明，在5大类食品消费中，粮食和肉禽蛋是城镇居民的主要消费品，约占食品消费的55%，烟酒茶消费份额随着人们收入提高呈下降趋势.各种食品跳出“短缺”困境，食品间的替代关系增加.%The Almost Ideal Demand Sy stem（AIDS） is used to condition of analy ze systematically the food consumption u rban inhabitants of Henan Province and a n AIDS model is set up as a basis to ana lyse the elasticities of demand expendit ure and price （own price elasticity and cross-price elasticity）．The results show that among the five major groups of foo d consumption，grain and poultry and egg are major consumer goods，55％ of total ex penditure in urban housholds．Tobacco，lig ur and tea’s shares are decreasing，as in come increasing．All foods have leap out of the shortage，and the substituting rel ationship among the foods is expanding.