Skill Balance and Entrepreneurship Evidence from Online Career Histories
基于专业社交网站的职业数据，检验Lazear的“多面手”理论，发现技能多样性通过增加特定技能的概率促进创业，但结果对样本和回归设定敏感。
Lazear's jack–of–all–trades theory suggests that individuals with balanced skills are more likely to become entrepreneurs, and that balanced skills can be accumulated by studying a varied curriculum, working in a variety of functions, and working for a variety of employers. We reexamine the theory using a matched case–control sample, constructed from a professional networking website that controls for unobserved heterogeneity in employer and job characteristics. We find evidence that variety predicts entry into entrepreneurship, largely through its positive association with the likelihood of having certain specific skills. However, our analysis also demonstrates that attempts to identify the effects of skill variety on entrepreneurship are likely to be highly sensitive to sample construction and regression specification.