Lawyer Timothy Sandefur of the Pacific Legal Foundation is guest blogging at the Volokh Conspiracy.
In 2009, Sandefur spoke at Rockford University 
on on the topic of “Market Entrepreneurs and Political Entrepreneurs: Some Legal and Constitutional Issues”; my follow-up interview with him is at the CEE site.
He is the author of several works, including this this monograph on the right to earn a living: Sandefur discusses economic liberty’s up-and-down legal fortunes, as the American founders’ original protections of productive freedom, property and contract rights came under attack during the Progressive era and the New Deal, leading up to our own era of mixed premises and politicized business.