comparing of demand systems in explaining of iranian urban households consumption behaviour

selection of best demand model for explaining of consumer behaviour is one of the most important issues in microeconomic. in this paper we introduce aids[1],cbs[2], nbr[3] and rotterdam model and estimate these models by iranian urban households data for period 1973-2012.seemingly unrelated regression method is chosen for estimation of 5 groups of commodities including food, housing, clothing, appliances and furniture and miscellaneous. in this survey we calculate price and income elasticity for 5 commodity groups and we test homogeneity and symmetry conditions in each model. results indicate that nbr model is the best model for satisfying demand attributes in iran.   jel:d11, d12 [1] - almost ideal demand system [2] - central bureau voor de statistiek, the dutch name of statistics netherlands [3] - the national bureau of research