Tomas Chamorro-Premuzic, professor at University College London, on how confidence masks incompetence. For more, read Confidence: Overcoming Low Self-Esteem, Insecurity, and Self-Doubt . Download this podcast SARAH GREEN: Welcome to the HBR IdeaCast, from Harvard Business Review. I'm Sarah Green. Today, I'm talking with Tomas Chamorro-Premuzic, a regular contributor to HBR, and the author of the book, Confidence.