New York Yankees pitcher Andy Pettitte is famous not only for his phenomenal left arm, but also for his rock-solid integrity. So when he confessed in December 2007 to illegally using human growth hormone following an elbow injury, Dolly Chugh, an assistant professor at New York University’s Stern School of Business, listened closely. “I felt an obligation to get back to my team as soon as possible,” Pettitte explained in a statement. “I wasn’t looking for an edge; I…

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