Complementing chapter 2’s focus on theoretical determinants of entrepreneurship, this chapter presents an overview of its empirical determinants. A vast amount of literature has addressed this topic, and the chapter is organized into several large sections summarizing these determinants, including financial and non-financial factors; human capital; social capital; risk aversion, psychological and cognitive predispositions; and numerous socio-demographic characteristics. Additional empirical results are presented regarding the drivers of nascent and habitual entrepreneurship. Most entrants to entrepreneurship formerly worked in organizations: the characteristics of organizations associated with entrepreneurial employees are explored, both for those who start new independent ventures and those who undertake corporate ventures (intrapreneurs’). The chapter closes with some conclusions about the state of empirical knowledge about entrepreneurship and directions for future research.