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William Bernstein

William J. Bernstein, Ph.D., M.D., is a neurologist and the cofounder of the investment management firm Efficient Frontier Advisors. He is the author of three finance books--"The Intelligent Asset Allocator, The Four Pillars of Investing, and The Investor's Manifesto"--and two volumes of economic history, "The Birth of Plenty" and "A Splendid Exchange". Bernstein is currently working on a history book exploring the effects of access to technology on human relations and politics.