You don’t have to be a jerk to get ahead — in business and in life, according to David DeSteno, a Northeastern University psychology professor. Instead, positive emotions lead to bigger wins. He spoke with Knowledge at Wharton about this concept, which he wrote about in his book — Emotional Success: The Power of Gratitude, Compassion, and Pride . His comments came during the  Knowledge at Wharton show, which airs on SiriusXM channel 111 . The following is an edited transcript of the conversation. Knowledge at Wharton: Why did you hone in on these specific qualities of gratitude, compassion and pride? David DeSteno: We do a lot of work in my lab trying to understand how emotions affect social behavior and self control. If you read a lot of the bestsellers out there on how to have grit and succeed and persevere in the face of difficulties, the emotional side is kind of left out of it.…