Entrepreneurship often concentrates in certain geographic locations, with Silicon Valley the most famous example today. While a large literature focuses on these cross-location differences in entrepreneurial density, questions remain about the supply of entrepreneurial skills across locations. Using Italian data, this column investigates whether selection into entrepreneurship is affected by learning opportunities in adolescence. Those who grow up in an area with higher entrepreneurial density are found to be more likely to become entrepreneurs themselves. They are also more likely to succeed and earn a higher income.