At River Twice Research, Karabell analyzes economic and political trends. He is also a senior advisor for Business for Social Responsibility. Previously, he was executive vice president, head of marketing and chief economist at Fred Alger Management, a New York-based investment firm, and president of Fred Alger and Company, as well as portfolio manager of the China-U.S. Growth Fund, which won a five-star designation from Morningstar. He was also executive vice president of Alger's Spectra Funds, which launched the $30 million Spectra Green Fund based on the idea that profit and sustainability are linked. Educated at Columbia, Oxford, and Harvard, where he received his Ph.D., he is the author of several books, including Superfusion: How China and America Became One Economy and Why the World's Prosperity Depends on It (2009), The Last Campaign: How Harry Truman Won the 1948 Election, which won the Chicago Tribune Heartland Award, and Peace Be Upon You: The Story of Muslim, Christian, and Jewish Coexistence (2007), which examined the forgotten legacy of peace among the three faiths. In 2003, the World Economic Forum designated Karabell a "Global Leader for Tomorrow." He sits on the board of the World Policy Institute and the New America Foundation and is a member of the Council on Foreign Relations. He is a regular commentator on national news programs, such as CNBC and CNN, and has written for The Wall Street Journal, Newsweek, Time, The Washington Post, The New Republic, The Los Angeles Times, The New York Times, and Foreign Affairs.