An infomercial is a form of television commercial, which generally includes a phone number or website. Most often used as a form of direct response television (DRTV), long-form infomercials are typically between 15 and (more commonly) 30 minutes in length. Infomercials are also known as paid programming (or teleshopping in Europe). This phenomenon started in the United States, where infomercials were typically shown overnight (usually 2:00 a.m. to 6:00 a.m.), outside of peak prime time hours for commercial broadcasters. Some television stations chose to air infomercials as an alternative to the former practice of signing off. By 2009, most infomercial spending in the U.S. occurs during the early morning, daytime and evening hours. Stations in most countries around the world have instituted similar media structures. The infomercial industry is worth over $200 billion.