This paper looks inside the “black box” of the family and examines the determinants of inter vivos transfers in the form of allowances given to children. We consider in a simple model two main competing explanations for the transfer of money from parents to children in the form of regular allowances, namely altruism and exchange. We also extend the altruism framework to include unobserved child heterogeneity in monetary autonomy or the 'value of independence'. We use a unique dataset drawn from the British Family Expenditure Survey, which enables us to explicitly test both the inter-generational predictions of the various models, and through a study of siblings, we are also able to consider the intra-household aspects of such payments. Usin...