size of government: expenditures, taxes, and enterprises
legal structure and security of property rights
access to sound money
freedom to trade internationally; and
regulation of credit, labor, and business
And, reading further, buying into this means you agree that a large "size of government" is inherently bad, that "inflation is a a monetary phenomenon," and that all regulations reduce freedom.This is of course a libertarian point of view. Personally, I have found that Obamacare subsidies have given me the freedom to start a business without putting my family at risk, that inflation can be rooted in technological supply-side or demand-side shocks, and that regulations like nutritional information requirements make me more free by giving me more information.
With this understanding, the USA is more "economically free" than at any point in my lifetime.