The researchers’ paper discusses a concept known as “emotional labor,” in which employees regulate their public displays of emotion to comply with certain expectations. Part of this is “surface acting,” in which, for instance, the tired and stressed airline customer service agent forces himself to smile and be friendly with angry customers who have lost their luggage. That compares to “deep acting,” in which employees exhibit emotions they have worked on feeling. In that scenario, the stressed-out airline worker sympathizes with the customer and shows emotions that suggest empathy. The second approach may be healthier, Barsade says, because it causes less stress and burnout, particularly emotional exhaustion from having to regulate one’s emotions and “play a role.”