In this article, the authors examine effects of partners' attitudes on the timing of the birth of a first child, the division of domestic labor, the division of child care, and the division of paid labor of couples. They use data from the Panel Study of Social Integration in the Netherlands, which includes independent measures of both partners' attitudes in one wave (1995) and family life behavior in the next wave (1999). Using theories about decision rules, the authors formulate hypotheses about possible outcomes when partners have dissimilar attitudes. The results show that partners' attitudes are not always identical. Most important, attitudes of both partners are found to be equally important in joint decisions. (Contains 4 tables and 1 note.)