An influential hypothesis in family research is that having many economic resources
decreases women’s and increases men’s rate of entering a union. A more recent
hypothesis is that the strength of the association between economic resources and union formation has weakened over time, given decreasing role differentiation by gender. Rather than looking at the timing of union formation, we look at its non-occurrence. Using the Netherlands Kinship Panel Study, we find that, as predicted, high-resource women and low-resource men are more likely to remain single. Contrary to predictions, university-educated men are also more likely to remain single. The association between economic resources and permanent singlehood shows little change over time. Several explanations for this unexpected finding are discussed.