This graph using large amounts of data is an example of cliometrics.
Cliometrics sometimes refered to as new socialhistory, or econometric history, constitutes the systematic application of economic theory, econometric techniques, and other formal or mathematical methods to the study of history (particularly social and economic history). It consists on a quantitative approach to economic history.
Cliometrics can be defined as a technique for the interpretation of economic history, based on the statistical analysis of large-scale numerical data from population censuses, parish registers, and similar sources.
