Babysitting is the practice of temporarily caring for a chil on behalf of the child's parents. Babysitting is most commonly performed as an odd job by teenagers for extra money, stereotypically, but not necessarily, girls. Babysitting can be quite lucrative in some countries, but rates vary considerably according to the location. According to Runzheimer International's Mobility Report, average hourly rates in September 2005 in the United States of America are $6.04. In New York City, the average is $11.08, whereas in some places in the U.S., the average is $2.90. Babysitters are often employed on Friday and Saturday nights when parents wish to go out. A babysitter is distinguished from a nanny by the term of employment; while some parents may have a regular babysitter "on retainer," so to speak, the sitter is normally contracted one night at a time.