With employers facing a talent crunch and many companies competing for the top talent, American workers are in a good position to negotiate for a raise — and yet most choose not to.

According to a study conducted by staffing firm Robert Half, just 39 percent of workers negotiated their salary during their last job offer. Robert Half surveyed more than 2,700 workers across 27 major U.S. cities and found that some people were more likely to negotiate than others.