 So I think there's a number of leadership models. Some are based on competency, which assumes that you start at a low level of competency and your competency increases as you gain skills and mentors and time goes on. There are also models that are more collective, which deal with basically sharing the power or distributing the power, quote, unquote, of leadership. And then there are collaborative models which really focus more on across institutions and cross-disciplines. And I think lately the one that is gaining the most favor revolves around design thinking, similar to what David Kelly and the IDEO folks do about sharing the empathy and transparency with your team, understanding what your team values and building those values into how you lead your organization, which allows you to fully empower your team. And that would be my favorite one. It's also the one that takes a little longer than some of the others to develop.