Gary Libecap, formerly at U of Arizona, has now moved to UC Santa Barbara. Gary is an expert on property rights and US economic history.
An important point which Gary helps enlighten me in his work is why property rights might not always evolve in an efficiency-enhancing manner. His best work thus far, in my view, is certainly Contracting for Property Rights.
Now Gary has a new book out called Owen Valleys Revisited, more information about the book can be found here.