There’s no such thing as a free lunch : altruistic parents and the response of household food expenditures to nutrition program reforms

Many countries provide extensive in-kind public transfers for specific needs of
particular client groups such as the elderly, the disabled, and children. However, this may crowd out private expenditures on the goods in question and, to some extent, undermine the case for not simply giving cash. If the target group belongs to a larger household the mechanism behind this crowding out could be either altruism or agency. This paper is concerned with three nutrition programmes for children in UK households: free lunch at school for children from poor households; free milk to poor households with pre-school children; and free milk at day-care for pre-school
children in attendance regardless of parental income. We exploit a reform that
removed eligibility to the first two programs from working poor households. We find significant crowding-out of private food expenditures – a free school lunch reduces food expenditure by around 15% of the purchase price of the lunch, and a free pint of milk reduces milk expenditure by about 80% of the market price. We conclude
that this is due to altruism rather than agency problems because milk expenditure
crowd-out is similar across milk programs that have different delivery mechanisms.