VOICES: CLAYTON M. CHRISTENSEN

TITLE
Professor, Harvard business school. 46.

CONTRIBUTIONS
Christensen wrote the groundbreaking 1997 book The Innovator's Dilemma: When New Technologies Cause Great Firms to Fail. He argues that even well-managed companies have trouble coping with ''disruptive'' innovations that make their current technologies obsolete.

IN HIS WORDS
''The batting average for dealing with disruptive technologies is zero. If you want to survive, you have to create a separate company or attack yourself.''