A new study says nice people aren't very good at saving money. Researchers at Columbia University found people who are more agreeable are the least likely to save money because they prioritize hanging out with people over material wealth. On the other hand, highly conscientious people might be more motivated to plan for the future and put away money regularly. The study, which matched personality traits to how people handle finances, found that people save only 2.3-percent of their income. That's the lowest in nearly two decades. There’s good news, though. People sent emails encouraging them to save were more likely to.