Indeed, judges rated the happy students as having greater managerial potential than the others. Furthermore, insurance agents with a positive disposition have been found to sell more insurance policies than their less positive counterparts (Seligman & Schulman, 1986). Although such correlational evidence does not prove causality, some preliminary data suggest that the relationship between happiness and performance can be bidirectional. In other words, happy moods lead workers to perform better and better performance produces happy moods; the two components mutually reinforce each other (Coté, 1999). Superior performance by happy employees is not limited to tasks explicitly prescribed by the job position.