This paper reviews and critically evaluates existing evidence on female entrepreneurial activity. First, we identify how female-run businesses are different, by examining both economic and non-economic outcomes which are frequently overlooked. Second, we offer a comprehensive discussion of drivers to explain why these differences. We group these drivers in four categories: (i) preferences, (ii) endowments, (iv) external constraints, and (iv) internal constraints. Third, we review evidence on the types of policies that have been effective or have potential to address the different drivers. Finally, we offer a discussion of the gaps in the literature and identify areas for future research.