ex expanding 中文意思是什麼
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Abstract : 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
文摘:利用幾乎理想系統（ aids ）對河南城鎮居民的食品消費狀況進行了系統分析，建立了幾乎理想需求系統模型，並在此基礎上進行了需求支出彈性和需求價格彈性（自價格彈性和交叉價格彈性）分析，結果表明，在5大類食品消費中，糧食和肉禽蛋是城鎮居民的主要消費品，約占食品消費的55 % ，煙酒茶消費份額隨著人們收入提高呈下降趨勢.各種食品跳出「短缺」困境，食品間的替代關系增加
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