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Writing threads to demystify business and finance. Investor, advisor and educator. Gave up a grand slam on ESPN in 2012 and still waiting for it to land.
Essayist, mathematical statistician, former option trader, risk analyst, and aphorist. Work concerns problems of randomness, probability, and uncertainty.
Professor at Columbia University's Graduate School of Business and advisor at First Eagle Investment Management. Author of Value Investing: from Graham to Buffett and Beyond and Competition Demystified: A Radically Simplified Approach to Business Strategy. Referred to as "a guru to Wall Street's gurus" and a recognized authority on value investing.
Business Model designer @ Business Models Inc Specialized in strategy, financial business modelling and innovation of green and sustainable business models
I work for Microsoft. Previously I was a partner at Eagle River, a private equity firm established by Craig McCaw. I am on the board of directors of Kymeta.
Author of "Value Investing: From Graham to Buffett and Beyond"