Lance Edwin Davis, Caltech's Mary Stillman Harkness Professor of Social Science, Emeritus, passed away on Monday, January 20, 2014, at age 85. Davis was a pioneer of "cliometrics"—from Clio, the Greek muse of history—which applies modern economic theories and mathematical techniques to economic systems that no longer exist, such as the New England textile industry. These analyses required him to sift through the data buried in such things as whalers' logs from New Bedford, Massachusetts, or the records of the East India Company in order to test his hypotheses about how defunct industries and empires actually worked. "In the process," says Philip Hoffman, the Rea A. and Lela G. Axline Professor of Business Economics and professor of history, "economic history became part of economics and the whole field was remade." Davis was also instrumental in establishing Caltech's social science doctoral program, a combination of economics and political science with a uniquely mathematical approach.