67=. Lucy Marcus, Businesswoman
The founder and head of Marcus Venture Consulting, Marcus is also a columnist for both Reuters and Harvard Business Review and is a major voice on boards and corporate governance. She tweets breaking financial news as well as her own views on big issues. It's a seriously impressive source for information on a range of business topics – from "Has mobile money's moment come?" or "Which tech cos [companies] come out tops in fighting climate change" to the scandals about child cotton workers. Useful reading for business experts and neophytes alike.
Tweets as: @lucymarcus PeerIndex: 61 Authority: 59 Activity: 86 Audience: 66 Follows: 569 Followers: 7,157Follow @lucymarcus