 His interests in the economics of regulation were combined with Sir Edwin Chadwick's historical study in 2012.Chadwick's sophisticated 19th-century conceptions of moral hazard, common pool problems, asymmetric information, and theory of "competition for the field" of service (franchising) were pioneering concepts in contemporary theory but were only rediscovered in the second half of the 20th century.Ekelund along with E. O.