*Baker, George and Thomas Hubbard (2004), "Contractibility and Asset Ownership: On-Board Computers and Governance in U.S. Trucking", Quarterly Journal of Economics, 119, pp.1443-79. [http://www.edegan.com/pdfs/Baker%20Hubbard%20(2004)%20-%20Contractibility%20and%20Asset%20Ownership.pdf pdf]