From “We Can Measure the Power of Charisma”, Q&A with Alex Pentland, Harvard Business Review (Jan-Feb 2010); read full article at HBR site.
The more successful people are more energetic. They talk more, but they also listen more. They spend more face-to-face time with others. They pick up cues from others, draw people out, and get them to be more outgoing. It’s not just what they project that makes them charismatic; it’s what they elicit. …
We think face time with colleagues is vital, as much as 2.5 times as important to success as additional access to information. …
We’re social creatures. When we see someone we are looking for those honest signals. Are they enthusiastic? Do they look like they know what they’re talking about? … Over the long term, the content matters more to success, obviously. But both are important. Positive, energetic people have higher performance.

Jane Friedman (@JaneFriedman) has nearly 25 years of experience in the media & publishing industry. She is the publisher of The Hot Sheet, the essential newsletter on the publishing industry for authors, and was named Publishing Commentator of the Year by Digital Book World in 2019.
In addition to being a professor with The Great Courses (How to Publish Your Book), she is the author of The Business of Being a Writer (University of Chicago Press), which received a starred review from Library Journal.
Jane speaks regularly at conferences and industry events such as Digital Book World and Frankfurt Book Fair, and has served on panels with the National Endowment for the Arts and the Creative Work Fund. Find out more.