MGM was the last studio to convert to sound pictures, but in spite of this fact, from the end of the silent film era through the late 1950s, Metro-Goldwyn-Mayer was the dominant motion picture studio in Hollywood. Always slow to respond to the changing legal, economic, and demographic nature of the motion picture industry during the 1950s and 1960s, and although at times its films did well at the box office, the studio lost significant amounts of money throughout the 1960s. In 1966, MGM was sold to Canadian investor Edgar Bronfman Sr., whose son Edgar Jr. would later buy Universal Studios. Three years later, an increasingly unprofitable MGM was bought by Kirk Kerkorian, who slashed staff and production costs, forced the studio to produce low-quality, low-budget fare, and then ceased theatrical distribution in 1973. The studio continued to produce five to six films a year that were distributed through other studios, usually United Artists. Kerkorian did, however, commit to increased production and an expanded film library when he bought United Artists in 1981.