Since the 1930s, no economists from the University of Vienna or any other Austrian university have become leading figures in the so-called Austrian school of economics. In the 1930s and 1940s, the Austrian school moved to Britain and the United States, and scholars associated with this approach to economic science were located primarily at the London School of Economics (1931–1950), New York University (1944–), Auburn University (1983–), and George Mason University (1981–). Many of the ideas of the leading mid-twentieth-century Austrian economists, such as ludwig von mises and f. a. hayek, are rooted in the ideas of classical economists such as adam smith and david hume, or early-twentieth-century figures such as knut wicksell, as well as Menger, Böhm-Bawerk, and Friedrich von Wieser. This diverse mix of intellectual traditions in economic science is even more obvious in contemporary Austrian school economists, who have been influenced by modern figures in economics. These include armen alchian, james buchanan, ronald coase, Harold Demsetz, Axel Leijonhufvud, douglass north, Mancur Olson, vernon smith, Gordon Tullock, Leland Yeager, and Oliver Williamson, as well as Israel Kirzner and Murray Rothbard. While one could argue that a unique Austrian school of economics operates within the economic profession today, one could also sensibly argue that the label “Austrian” no longer possesses any substantive meaning. In this article I concentrate on the main propositions about economics that so-called Austrians believe.