Key points are not available for this paper at this time.
John S. Akin, David K. Guilkey, Barry M. Popkin, James H. Wyckoff, The Demand for School Lunches: An Analysis of Individual Participation in the School Lunch Program, The Journal of Human Resources, Vol. 18, No. 2 (Spring, 1983), pp. 213-230
Akin et al. (Sat,) studied this question.