Gabriel Tarde. Psychologie économique. 2 Bände, Paris: Alcan 1902.
23
Исследование проведено в 2012 году.
24
Michael J. Sandel. What Money Can’t Buy: The Moral Limits of Markets. New York: Farrar, Straus and Giroux 2012.
25
T. Christian Miller. “Contractors Outnumber Troops in Iraq”. Los Angeles Times, July 4, 2007 and James Glanz. “Contractors Outnumber U.S. Troops in Afghanistan”. New York Times, 2, 2009.
