“Moonlighting” simply means working at multiple jobs or at one's own business, in addition to a primary job. Recent statistics released by the U.S. Department of Labor's Bureau of Labor Statistics show that 5 percent of Americans held multiple jobs in May 2012. The reasons workers moonlight are many, with financial need topping the list. However, moonlighting can have a detrimental effect on employees' performance in their primary job. As a result, some employers have adopted a written policy that clearly addresses what activities are allowed and what are not permitted.