The School Lunch Program and Nutrient Intake: A Switching Regression Analysis
基于全国食品消费调查数据，用转换回归分析发现学校午餐计划显著增加了低收入和高收入儿童的营养素摄入，且对低收入儿童影响更大。
Abstract The nutrient impact of the school lunch program is examined, using the basic sample of the National Food Consumption Survey. The results clearly indicate the program's substantial positive effect on nutrient consumption by both low income and high income children. Moreover, the nutrient impact of school lunch participation is shown to be greater for low income children.