Answers vary: "historical economics," the "economics of history," "econometric history" -- not many years ago, it was called the "new" economic history. The conclusion is all of the above. Stanley Reiter, a mathematical economist, who was "musing" for a word that described the quantitative economic history work he was discussing with colleagues, coined the word itself in 1960. He joined the Muse of History, Clio, with the suffix "metrics" from the word "econometrics." Hence, "Cliometrics." The term has evolved. Today a common definition is that Cliometrics is the application of economic theory and quantitative techniques to describe and explain historical events. In addition to economic theory and econometrics, Cliometricians often use large data sets to examine the past. To quote Deirdre McCloskey, one of the founders of the Society: "Cliometrics" is too easily construed from the Greek to mean simply quantitative history, rather than the application of quantitative and theoretical techniques to the study of historical phenomena.