Cliometrics (klīəˈmetriks), sometimes called new economic history, or econometric history, is the systematic application of economic theory, econometric techniques, and other formal or mathematical methods to the study of history (especially social and economic history). It is a quantitative (as opposed to qualitative or ethnographic) approach to economic history. The term cliometrics comes from Clio, who was the muse of history, and was originally coined by the mathematical economist Stanley Reiter in 1960. There has been a revival in 'new economic history' since the late 1990s.
The new economic history originated in 1958 with The Economics of Slavery in the Antebellum South by American economists Alfred H. Conrad and John R. Meyer, which caused a firestorm of controversy with its claim, based on statistical data, that slavery, being economically efficient and highly profitable for slaves owners, would not have ended in the absence of the U.S. Civil War. The new economic history revolution actually began in the mid-1960s and was resisted because many incumbent economic historians were either historians or economists who had very little connection to economic modeling or statistical techniques. Areas of key interest included transportation history, slavery, and agriculture. Cliometrics became better known when Douglass North and William Parker became the editors of the Journal of Economic History in 1960. The Cliometrics Meetings began to be held around this time at Purdue University and are still held annually in different locations. Today, cliometric approaches are standard in several journals, including the Journal of Economic History, Explorations in Economic History, the European Review of Economic History, and Cliometrica.