Professional envy can have positive and negative repercussions. Workplaces where managers make a point of comparisons — posting leaderboards or naming employees of the month — provide fertile ground for cultivating envy, says Michelle Duffy, who studies organizational behavior at the Carlson School of Management at the University of Minnesota. The green-eyed monster can foster environments where people act dishonestly and undermine, belittle or freeze out their colleagues, or even sabotage their work. Envy at work can damage productivity, creativity, teamwork and cooperation.