A ballet company is a group of dancers who perform classical ballet, neoclassical ballet, and/or contemporary ballet in the European tradition, plus managerial and support staff. Most major ballet companies employ dancers on a year-round basis, except in the United States, where contracts for part of the year (typically thirty or forty weeks) are the norm. A company generally has a home theatre where it stages the majority of its performances, but many companies also tour in their home country or internationally.