16. For more on the sunk-cost trap, see B. Staw and J. Ross. (1989). “Understanding behavior in escalation situations.” Science. 246: p. 216–220; H. Arkes and C. Blumer. (1985). “The psychology of sunk cost,” Organizational Behavior and Human Decision Processes. 35: p. 124–140; J. Brockner. (1992). “The escalation of commitment to a failing course of action,” Academy of Management Review. 17(1): p. 39–61.