This refers to the incremental income that people who are physically attractive earn when compared to others who are considered less attractive. The beauty premium has been attributed by researchers to a variety of reasons, including psychological biases that affect employer choices while hiring workers. Workers and managers who are physically attractive may be considered more honest and competent at work than others. Some researchers, however, have denied the existence of the beauty premium in the labour market. They argue that wage differences can be explained by factors other than physical beauty.