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英文文献：Household versus Community Effects: Who Really Pays More for Food?-家庭与社区效应:谁在食物上花的钱更多?一项文献表明，一个家庭的食品成本会随着家庭自身的收入和人口统计特征而变化
英文文献作者：Stewart, Hayden,Blisard, Noel
英文文献摘要：
One strand of literature shows a household's cost of food to vary with the household's own income and demographic characteristics. For example, low-income households may tend to purchase less costly bundles of food. However, a separate strand of literature also shows food prices to vary spatially with the characteristics of communities, such as real estate prices. In this study, a model is developed that unites these two strands. Simulations further illustrate the effect that a community's characteristics can have on a household's food budget, if the household lives in each of ten cities in the United States.
例如，低收入家庭可能倾向于购买价格较低的一捆捆食品。然而，另一项单独的文献也显示，食品价格随社区特征(如房地产价格)在空间上发生变化。在这项研究中，我们建立了一个模型，将这两条线结合起来。模拟进一步说明了一个社区的特征对一个家庭的食物预算的影响，如果这个家庭生活在美国十个城市中的每一个。
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