Peter J. Boettke, shuffling around in a maroon velour track suit or faux-leather rubber shoes he calls "dress Crocs," hardly seems like the type to lead a revolution.

But the 50-year-old professor of economics at George Mason University in Virginia is emerging as the intellectual standard-bearer for the Austrian school of economics that opposes government intervention in markets and decries federal spending to prop up demand during times of crisis. Mr. Boettke, whose latest research explores people's ability to...