True or false: Leaders have followers, but not all followers are subordinates. Quite true, says management professor Michael Useem , director of Wharton’s Center for Leadership and Change Management. Indeed, if managers wish to be effective, they must learn how to lead the people they report to as well as the employees they oversee. Useem calls this process “leading up.” Leaders have always been required to lead both up and down, but it is more important to lead up today than in years past. As organizations decentralize, managers must recognize that to accomplish their goals they must exert greater influence on superiors. “Leading up is the act of working with people above you – whether one boss, several bosses, a chief executive, a board of directors or even stockholders – to help them and you get a better job done,” says Useem, whose book, Leading Up: How To Lead Your Boss So You Both Win, is to be published in October by Random House.…