The Austrian School originated in late-19th and early-20th century Vienna with the work of Carl Menger, Eugen Böhm von Bawerk, Friedrich von Wieser and others. It was methodologically opposed to the younger Historical School (based in Germany), in a dispute known as Methodenstreit, or "methodology struggle". Current-day economists working in this tradition are located in many different countries, but their work is still referred to as Austrian economics. Among the theoretical contributions of the early years of the Austrian School are the subjective theory of value, marginalism in price theory and the formulation of the economic calculation problem, each of which has become an accepted part of mainstream economics.