Because of the considerable interest generated by this year’s Yearly Review focus we will again concentrate on advances in more traditional leadership research—especially works that are related to the development and/or testing of theory that does not concern newer approaches (such as transformational charismatic and authentic leadership). Again what are sought are original contributions that develop or test theory and/or theoretical thinking about older and more established approaches to leadership phenomena. Manuscripts that challenge the status quo offer new approaches to old ways of thinking or propose entirely new ways of thinking about leadership are especially encouraged. Particularly relevant will be work further developing or testing well-established approaches such as path-goal participative power influence exchange information processing and reinforcement based theory.