This study user employment data to examine why some industries host more new high-growth firm than other. It finds that increases in the proportion of employment of scientists and engineers in industries are positively associated with counts of fast-growing new firms. The findings suggest that technological innovation is an important determinant of entrepreneurial opportunity. Further, they suggest that private new firms are an important means of organizing commercial innovation and that new firms may be less constrained by complementary assets than has been proviously understood. (from journal's abstract) Gielnik, Michael M.; Hannes Zacher; and Michael Frese. (In press). Focus on Opportunities as a Mediator of the Relationship Between Business Owners' Age and Venture Growth. Journal of Business Venturing Combining upper echelons and lifepan theories, this study investigated the mediating effect of focus on opportunities on the negative relationships between business owners' age and venture growth. They expected and found that mental health moderates the negative relationships between business owners' age and focus on opportunities-mental health helps maintain a high level of focus on opportunities with increasing age. (from journal's abstract)