This is a response to the timely contribution by Pratt and Hanson (1988) to the debate on gender, class, and space. Their paper is particularly valuable in two respects. First, they demonstrate clearly the seriousness of the omission of women's socioeconomic status from the study of residential differentiation. Second, they emphasize the importance of changing household structures in urban residential differentiation. Their main concern is with the growth of female paid employment and two-income households: a related but relatively undeveloped area of study is the impact of other household changes on residential differentiation (for example, Holcomb, 1986).