چکیده در این مطالعه، تقاضای گروه های اصلی خوراکی در مناطق شهری ایران برای دوره زمانی1361 تا 1386 بررسی شده است. بدین منظور از سیستم تقاضای تقریباً ایده آل خطی (la/aids)، شاخص تقریب خطی لاسپیرس و روش رگرسیون های به ظاهر نامرتبط (sur) استفاده شد. نتایج به دست آمده نشان داد که متغیر متوسط جمعیت خانوار در بیشتر معادلات تأثیر معناداری بر تقاضای خانوار داشته است. قیود همگنی و تقارن نیز مورد آزمون قرار...

A quarterly, weakly-separable, Quadratic, Almost Ideal Demand System is estimated for beef, pork and chicken in Canada. The restrictions that would lead to the less flexible AIDS model were rejected at the five per cent level. Results for the first stage model indicated that demand for the meat group is inelastic, with an own-price elasticity of -0.24. Demand for beef in Canada was inelastic du...

one of the main principles of resistance economy, is to support domestic production and limiting imports, especially in sectors where there is the possibility of import-substituting production .this requires adjustment of exact trade policies,and to achieve this, identifying the structure of imports demand function and also price and income elasticity of import demand is necessary.this necessit...

The world has recently experienced major challenges in all respects general, and economic particular following the Coronavirus pandemic (COVID-19). This led people to improve their diet by consuming more vitamin-rich food commodities, especially vitamin C, because of its important effect promoting body immunity resistance for many diseases cold diseases. study relied on secondary data (time ser...

A variation of the Almost Ideal Demand System (AIDS) model of Deaton and Muellbauer (1980) has been employed to determine the impacts of per capita total expenditure, food prices and demographic variables on household demand for dairy products in Bangladesh. The budget shares are generally more responsive to per capita total expenditure than to prices. With respect to demographic effects, it is...