بررسی تقاضای گروه های اصلی کالاهای خوراکی در مناطق شهری ایران

اقتصاد و توسعه کشاورزی

مقاله 6، دوره 25، شماره 1، فروردین 1390   

نوع مقاله: مقالات پژوهشی

شناسه دیجیتال (DOI): 10.22067/jead2.v1390i1.8878

نویسندگان

فاطمه رضاپور^* ؛ محمود دانشور کاخکی؛ حسین محمدی

گروه اقتصاد کشاورزی، دانشکده کشاورزی، دانشگاه فردوسی مشهد

چکیده

Abstract
In this article, we examine the major food groups demand in urban areas of Iran for the period 1361 to 1386 by almost ideal demand system, Laspyres Price Index and using Seemingly Unrelated Regression(SUR). In this study, was included mean population of family, with commodities price index and real expenditure(income) of families, as independent variable, in equations system. The resultes showed that the mean population of family, in the most of equations, had significant effect on family demand. Also, homogeneity and symmetry restrictions has been tested. Results show that all of groups have negative own-price elasticities and the exception of meat, dried fruit, oils and fats and sugar and its products, the other groups are inelastic and among of them, grain is most inelastic and dried fruits is most elastic. Therefore, the government can use pricing policies in long time, in demand good management and correction of consumption model for given groups that them consumption have high elasticity then them price changes. Cereal and its products, bread, egg are necessary groups in food basket of urban families, too and sudden cut of subsidy of the groups isn’t nice and is offered scaledown of it. Meat, fresh fruits and vegetables are luxury and grain is inferior.

Keywords: Linear Approximation Almost Ideal Demand System(LA/AIDS), Laspyres Linear Approximation Price Index, Population mean of family, Income(Expenditure) and Price Elasticity, Urban Areas

JEL: C32, C51, D12, E21,Q1