Statistics on the share, size and industry distribution of women and men-owned enterprises provide key information on gender differences in entrepreneurship. They enable comparisons of the economic importance of women-owned enterprises across countries and over time. Moreover, they show how women entrepreneurs tend to own relatively smaller enterprises and select different industries with respect to men. The statistics have been primarily obtained by linking business registers to population registers or other administrative data. They are limited to sole-proprietor enterprises given the complexity of classifying enterprises with more than one owner along gender lines.