This Research Collection surveys the main contribution to labor supply decisions within the family. It covers both theory, from the initial 'unitary' model that postulates that the family behaves as a single decision maker, to modern 'collective' approaches that concentrates on differences in preferences and power relationships and empirical applications. Including an original Introduction by the Editors, a special emphasis is placed on dynamic approaches, in particular issues related to intra-household commitment, and on policy implications.