Quantitative economics are the theories of "Mathematical economists" based on the idea that there are constant relations in the sphere of human actions that can be quantified or measured, thus permitting the application of statistics and mathematical theories to economics. Mises maintains: "There is no such thing as quantitative economics." All statistics are history, sometimes economic history, but never economics.
- Percy L. Greaves, Jr. "Mises Made Easier ", 1974. Referenced 2014-08-21.