英文文献：School Food Service Costs: Does Location Matter?-学校餐饮服务费用:地点重要吗?通过美国农业部的全国学校午餐和早餐项目，每天向参与项目的美国学校的儿童提供超过3000万份午餐和980万份早餐
英文文献作者：Ollinger, Michael,Ralston, Katherine L.,Guthrie, Joanne F.
英文文献摘要：
Over 30 million lunches and 9.8 million breakfasts are served every day to children in participating American schools through the USDA National School Lunch and School Breakfast Programs. It is challenging for participating local school food authorities (SFAs) to serve appealing, healthful meals while covering food, labor, and other operating costs with USDA reimbursements. But it may be more difficult for some SFAs than others due to cost differences across locations. Analysis of data from a large national sample reveals that after controlling for differences in SFA characteristics, sharp differences in costs remained among rural, urban, and suburban SFAs and across regions. The highest costs occurred in Mid-Atlantic, suburban SFAs and the lowest cost existed in southwest, urban SFAs. Differences in food costs explained the largest share of this variation.

这对参与其中的地方学校食品管理机构(SFAs)来说是一个挑战，他们要提供诱人的、健康的膳食，同时还要支付食品、劳动力和其他运营成本，由美国农业部报销。但由于不同地点的成本差异，一些SFAs可能比其他SFAs更困难。对全国大样本数据的分析显示，在控制了SFA特征的差异之后，农村、城市和郊区的SFAs以及跨地区的成本差异仍然很大。成本最高的地区是大西洋中部和郊区，最低的地区是西南部和城市。食品成本的差异是造成这种差异的最大原因。