The document provides data on market shares and concentration ratios for various industries, including: - The 6 firm concentration ratio for the US film studio industry in 2005 was 71.6%, with the top 6 studios (Warner Bros., 20th Century Fox, Universal, Buena Vista, Sony, and Paramount) combining for over 70% of the total market gross. - No specific data or calculations are shown for the other concentration ratios mentioned, which include the UK music retailers in 2004, UK groceries in 2006, children's clothing in 2004, cinemas in 2006, insurance in 2006, US computer market in 2003, UK electricity generation in 2007, global hip and knee reconstruction in 2006, and mobile