Critics have concluded that modern Austrian economics generally lacks scientific rigor,[10][12] which forms the basis of the most prominent criticism of the school. Austrian theories are not formulated in formal mathematical form,[108] but by using mainly verbal logic and what proponents claim are self-evident axioms.

[10] Caplan, Bryan. "Why I Am Not an Austrian Economist". George Mason University. Retrieved 2008-07-04. "More than anything else, what prevents Austrian economists from getting more publications in mainstream journals is that their papers rarely use mathematics or econometrics, research tools that Austrians reject on principle...Mises and Rothbard however err when they say that economic history can only illustrate economic theory. In particular, empirical evidence is often necessary to determine whether a theoretical factor is quantitatively significant...Austrians reject econometrics on principle because economic theory is true a priori, so statistics or historical study cannot "test" theory."

[12] White, Lawrence H. (2008). "The research program of Austrian economics". Advances in Austrian Economics (Emerald Group Publishing Limited): 20

[108] Walker, Deborah L.. "Austrian Economics". Library of Economics and Liberty. Retrieved 2010-01-23.