(Bloomberg Business) — New research confirms what most people already knew: the office antagonist ought to be fired. Jerks in the workplace bring morale down, cost a lot of money to deal with, and risk sending good employees running.

In a report published Tuesday, talent management firm Cornerstone OnDemand analyzed a dataset of 63,000 employees and singled out "toxic employees," or people who were dismissed from their jobsbecause they harassed their coworkers, falsified documents, engaged in fraud, or were violent in the workplace.

Not surprisingly, the firm found toxic employees made people around them miserable. When the ratio of toxic employees rose by a one in 20 ratio, their coworkers became 54 percent more likely to quit their job, the firm found.