According to the American Management Association, almost half (48%) of the companies surveyed use video monitoring to counter theft, violence, and sabotage. Only 7% use video surveillance to track employees' on-the-job performance. Most employers notify employees of anti-theft video surveillance (78%) and performance-related video monitoring (89%), (Retrieved from the article The Latest on Workplace Monitoring and Surveillance) In an article in "Labour Economics", it has been argued that forbidding employers to track employees' on-the-job performance can make economic sense according to efficiency wage theory, while surveillance to prevent illegal activities should be allowed. An indirect way that companies can be affected financially through employee monitoring is that they can be sure they are billing clients correctly. According to "Business 2 Community", inaccurately billing clients is always possible because of human error. Such inaccuracies can cause disputes between a company and a client which could eventually lead to the client terminating its business with the company. This sort of termination will not only hurt the company's revenue stream but also its reputation with other clients or potential clients. The suggested solution to this problem is a time tracking software to monitor the number of hours a client spends with an employee. Johnathan Yerby said, "The enormity of potential productivity losses, as reported by Court (2004), is approximately one million dollars annually for a company with 500 employees surfing the Internet for just a half hour a day." Not only does employee monitoring prevent theft of money and resources, but it also prevents theft of time. This often happens during the holidays with online shopping, as well as during March Madness. Employees might spend their time using their work time for personal uses and employee monitoring is intended to regulate this.