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Ripley, William Zebina (13 October 1867–16 August 1941), economist and authority on railroads, was born in Medford, Massachusetts, the son of Nathaniel L. Ripley, a manufacturer of jewelry in Boston, and Estimate R. E. Baldwin. After attending the public schools in the nearby town of Newton, Ripley became a student at the Massachusetts Institute of Technology in Cambridge. He graduated from the institute in 1890 with an A.B. in civil engineering and then remained for a year of graduate work in economics. He then attended Columbia University, where he received an A.M. in 1892 and a Ph.D. in political economy in 1893. His doctoral dissertation was published as ...