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Zachary Karabell is President of River Twice Research, an independent economic research and consulting company, and President of River Twice Capital Advisors, a money management firm. Previously, he was Executive Vice President, Chief Economist, and Head of Marketing at Fred Alger Management, a New York-based investment firm that manages approximately $15 billion in mutual funds and institutional accounts. He was also President of Fred Alger & Company, a broker-dealer; Portfolio Manager of the 5-star China-U.S. Growth Fund (CHUSX); and Executive Vice President of Alger’s Spectra Funds, a no-load family of mutual funds that launched the Alger Green Fund. At Alger, he oversaw the creation, launch and marketing of several funds, led corporate strategy for strategic acquisitions, and represented the firm at public forums and in the media.

Educated at Columbia, Oxford and Harvard, where he received his Ph.D., Karabell has taught at several leading universities, including Harvard and Dartmouth, and has written widely on economics, investing, history and international relations. He is the author of eleven books, including The Last Campaign: How Harry Truman Won the 1948 Election (which won the Chicago Tribune Heartland Award for best non-fiction book of the year) and Superfusion: How China and America Became One Economy and Why The World's Prosperity Depends On It. His most recent book, Sustainable Excellence: The Future of Business in the 21st Century, co-authored with Aron Cramer, was published in October 2010. He sits on the board of the New America Foundation, the Carnegie Council on Ethics and International Affairs, and the World Policy Institute, and in 2003, the World Economic Forum designated him a "Global Leader for Tomorrow." He is a frequent columnist for Time magazine, a CNBC Contributor, and writes for such publications as The Wall Street Journal, Los Angeles Times, The New York Times, Newsweek,and Foreign Affairs.