‘I don’t know’ is a phrase seldom coined in comfortable situations – especially in the boardroom. However, its use is of crucial importance in business, despite the impression you might give on The Apprentice. It can be hard for a business leader to admit a gap in their knowledge but Steven Levitt, author of Freakonomics thinks that it’s an essential aspect of the job. In an interview with Marketing Week, he explained his opinion. Click here to watch the video.