The role of talent and creativity in economic development has been a subject of growing interest to social scientists. Human capital is observed both to be an important contributor to growth and to be unevenly distributed geographically. While there is consensus on the importance of human capital to economic development, debate takes shape around two central issues. First, there is the question of how best to measure human capital. The conventional measure of human capital is based on educational attainment (share of population with a bachelors degree and above). But more recent research suggests that it is more important to measure what people do than what they study, and thus occupationally based measures, associated principally with creative class occupations, have been introduced. Second, there is debate over the factors that yield the geographic distribution of human capital in the first place. Three alternative factors have been found to play a role: universities; amenities (measured here as diversity of service industries); and openness and tolerance.