Control and interpret information flow. Set and control agendas. Define organizational vision. Build and cultivate strategic alliances and networks Power provides an essential ingredient for managing the modern firm. Authority - the right to issue directions and expend resources.
Authority is related to power, but is narrower to scope.
Authority is a function position within the organization. Leadership - the ability to influence people to willingly follow one's guidance or adhere to one's decisions. Obtaining followers and influencing them in setting and achieving objectives makes a leader. Leaders use power in influencing group behavior. Leadership and Management Leadership is not necessarily the same thing as management.