Explain what is meant by a manager’s power base, the ways a manager develops it, and how a manager can effectively use it to achieve organizational and personal goals. Discuss what is meant by upstream influence and the various influence tactics categories associated with it. Explain the difference between the University of Michigan studies and the Ohio State studies. Summarize the path-goal model of leadership. What theories of motivation can you tie to the assumptions of the model? Explain why the study of leadership styles and approaches tends to generate much controversy among researchers and academics.