Clay Christensen, Harvard Business School professor and coauthor of the HBR article "Reinventing Your Business Model."

Diane Coutu, HBR senior editor and coauthor of the article "What Can Coaches Do for You?"

Michael Watkins, cofounder of Genesis Advisers and author of the HBR article "Picking the Right Transition Strategy."

Annie McKee, founder of the Teleos Leadership Institute and coauthor of "Becoming a Resonant Leader."

Marshall Goldsmith, executive coach and author of "Succession: Are You Ready?"

Peter Ubel, physician and behavioral scientist at the University of Michigan and author of "Free Market Madness."

Barbara Kellerman, lecturer at the Harvard Kennedy School and author of "Followership: How Followers Are Creating Change and Changing Leaders."

Sydney Finkelstein, Tuck School of Business professor and author of "Why Smart Executives Fail: And What You Can Learn from Their Mistakes."

Colonel Tom Kolditz, professor and head of the department of Behavioral Sciences and Leadership at the U.S. Military Academy at West Point.

Paul Krugman, Nobel Prize-winning economist and op-ed columnist for The New York Times.

Philip Lay and Todd Hewlin, managing directors at TCG Advisors and coauthors of the HBR article "In a Downturn, Provoke Your Customers."

John Quelch, Harvard Business School professor and coauthor of the HBR article "How to Market in a Downturn."

Paul Levy, president and CEO of Beth Israel Deaconess Medical Center in Boston.

Rita McGrath, Columbia Business School professor and coauthor of "Discovery-Driven Growth."

Dick Beatty, professor of human resource management at Rutgers University and coauthor of "The Differentiated Workforce."

Ann Livermore, executive vice president of Hewlett-Packard's Technology Solutions Group.

Claudio Fernández-Aráoz, senior adviser at Egon Zehnder International and coauthor of the HBR article "The Definitive Guide to Recruiting in Good Times and Bad."

Bill Drayton, founder and CEO of Ashoka.

Paul Osterman, professor at the MIT Sloan School of Management and author of "The Truth About Middle Managers."

Bob Sutton, professor of management science and engineering at Stanford University and author of the HBR article "How to Be a Good Boss in a Bad Economy."

Dave Ulrich, cofounder of the RBL Group and coauthor of "The Leadership Code: Five Rules to Lead By."

Ira Kay and Anne Sheehan, executive compensation debaters.

Bob Seelert, chairman of Saatchi & Saatchi and author of "Start with the Answer: And Other Wisdom for Aspiring Leaders."

Niall Ferguson, professor of history at Harvard University and professor of business administration at Harvard Business School.

Richard Bohmer, physician, Harvard Business School professor, and author of "Designing Care: Aligning the Nature and Management of Health Care."

Ron Heifetz, founder of the Center for Public Leadership at the Harvard Kennedy School and coauthor of "The Practice of Adaptive Leadership."

Sylvia Ann Hewlett, founding president of the Center for Work-Life Policy and coauthor of the HBR article "How Gen Y and Boomers Will Reshape Your Agenda."

Gary Pisano, Harvard Business School professor and coauthor of the HBR article "Restoring American Competitiveness."

Featuring the ideas of Jeff Stibel, Dan Gillmor, and Tom Davenport.

Roberto Verganti, professor of management of innovation at Politecnico di Milano and author of "Design Driven Innovation."

Stewart Friedman, Wharton School professor and author of "Total Leadership: Be a Better Leader, Have a Richer Life."

Cesare Mainardi, managing director of Booz & Company and coauthor of "Cut Costs, Grow Stronger."

John Baldoni, leadership consultant and author of "Lead Your Boss: The Subtle Art of Managing Up."

Nancy Koehn, Harvard Business School historian and editor of "The Story of American Business."

Vijay Govindarajan, director of the Center for Global Leadership at the Tuck School of Business and coauthor of the HBR article "How GE Is Disrupting Itself."

William Eggers, global research director at Deloitte and coauthor of "If We Can Put a Man on the Moon."

Dr. Robert Blendon, professor at the Harvard School of Public Health and the John F. Kennedy School of Government.

Roger Martin, dean of the Rotman School of Management and author of "The Design of Business."

Umair Haque, director of the Havas Media Lab.

Andrew McAfee, principal research scientist at MIT's Center for Digital Business and author of "Enterprise 2.0."

Whitney Johnson, founding partner of Rose Park Advisors.

Nicholas Eisenberger, managing principal of GreenOrder, joins us from Copenhagen.

Tammy Erickson, author of "What's Next, Gen X?: Keeping Up, Moving Ahead, and Getting the Career You Want."

Herminia Ibarra, professor of organizational behavior at INSEAD and coauthor of the HBR article "The Best-Performing CEOs in the World."

Julia Kirby, HBR editor at large.

Dr. Atul Gawande, surgeon at Brigham and Women's Hospital and author of "The Checklist Manifesto."

Tom Davenport, Babson College professor and coauthor of "Analytics at Work: Smarter Decisions, Better Results."

Anna Bernasek, financial journalist and author of "The Economics of Integrity."

Daniel Pink, author of "Drive: The Surprising Truth About What Motivates Us."

Walter Kiechel, former managing editor at Fortune magazine and author of "The Lords of Strategy: The Secret Intellectual History of the New Corporate World."