Abstract
The world has recently experienced major challenges in all respects in general, and in economic in particular following the Coronavirus pandemic (COVID-19). This has led people to improve their diet by consuming more vitamin-rich food commodities, especially vitamin C, because of its important effect in promoting body immunity and resistance for many diseases and cold diseases. The study relied on secondary data (time series) during the period (2001-2020), collected from various sources. The study estimated the demand function and the different factors affecting demand. The near-optimal demand model in the Saudi market is the models used in the study by analyzing commodity demand equations system according to their variety or sources. The research examined the application of this model in the study of domestic demand for the most important commodities consumed in Saudi Arabia (orange-lemon-tangerines). The results show that the suggested model obtained conditions of the application function, which are addition, homogeneity, symmetry, price, cross demand and expenditure elasticities. It is noted that the own-price demand elasticity was negative, and less than the correct one for lemons, which indicated that it was a necessary commodity. The demand for both oranges and tangerines turned out to be elastic. It also turns out that there is a direct relationship between lemon prices and spending on lemons and tangerines. There is an inverse relationship between the price of both lemons and spending on oranges. It also noted that the indicative of spending elasticity for both oranges and lemons was positive.
Highlights
Vitamin C is one of the most important nutrients you need to stay healthy, helping to improve public health and strengthen the immune system, especially in light of the Coronavirus pandemic
The research examined the application of this model in the study of domestic demand for the most important commodities consumed in Saudi Arabia
The results show that the suggested model obtained conditions of the application function, which are addition, homogeneity, symmetry, price, cross demand and expenditure elasticities
Summary
Vitamin C is one of the most important nutrients you need to stay healthy, helping to improve public health and strengthen the immune system, especially in light of the Coronavirus pandemic. In order to strengthen the body, it needs certain nutrients, mainly vitamin C. There are many food commodities rich in this vitamin, the most important of which is citrus. The world has recently experienced significant challenges in all respects in general and economic in particular, the impact of the Coronavirus pandemic (COVID 19), which prompted people to improve their diet by consuming more vitamin-rich food commodities, especially vitamin C, because it has important effects in enhancing body immunity and resisting many diseases and colds. One of the most important of these commodities is (oranges, lemons and tangerines), which are important commodities consumed in Saudi society
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