Marshall Jevons is the name of a fictitious crime writer invented and used by William Breit and Kenneth G. Elzinga, professors of economics at Trinity University, San Antonio and the University of Virginia, respectively. It was Breit's notion to write a mystery novel in which an amateur detective uses economic theory to solve crimes. Wikipedia
The definitive Wikipedia entry for Marshall Jevons. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Marshall_Jevons