A slightly technical read, but here you go: <a href="http:&#x2F;&#x2F;econfaculty.gmu.edu&#x2F;bcaplan&#x2F;whyaust.htm" rel="nofollow">http:&#x2F;&#x2F;econfaculty.gmu.edu&#x2F;bcaplan&#x2F;whyaust.htm</a>.