The Endowment Model of Return, Risk, and Diversification (Wiley Finance) [Hardcover]Martin L. Leibowitz (Author) Martin L. Leibowitz (Author) › Visit Amazon's Martin L. Leibowitz Page Find all the books, read about the author, and more. See search results for this author Are you an author? Learn about Author Central (Author), Anthony Bova (Author), P. Brett Hammond (Author)