John Semmens worked for the Arizona Department of Transportation (AzDOT) for 32 years. He has authored over 300 articles on transportation issues and was a contributing author to the award-winning book Street Smart: Competition, Entrepreneurship, and the Future of Roads, published by the Independent Institute. He is currently available for transportation consulting work. Send him mail.
Ludwig von Mises: ". The use of money in a market economy is a praxeologically necessary fact. That gold, and not something else, is used as money is merely a historical fact and as such cannot be conceived by catallactics." - Human Action