abstract: In spite of the existence of successful humble CEOs, the current strategic leadership literature has little understanding regarding what humility is and how humble CEOs influence organizational effectiveness by creating a context to motivate managers. After applying the self-concept framework to integrate the humility literature, I proposed four mechanisms through which CEO humility were related to middle manager ambidextrous behaviors and job performance: CEO empowering leadership, empowering organizational climate, top management team integration and heterogeneity. After developing and validating a humility scale in China, I collected survey data from a sample of 63 organizations with 63 CEOs, 327 top management team members and 645 middle managers to test the research model. Except for top management team heterogeneity, the other three CEO-middle manager mediating mechanisms received moderate support. Specifically, I found that humble CEOs were empowering leaders; their empowering leadership behaviors were positively associated with top management team integration and empowering organizational climate, which in turn correlated positively with middle manager ambidexterity and job performance. / Dissertation/Thesis / Ph.D. Business Administration 2011