Controls over media ownership in Australia are laid down in the "Broadcasting Services Act 1992", administered by the ACMA. Even with laws in place Australia has a high concentration of media ownership compared to other western countries. Ownership of national and the newspapers of each capital city are dominated by two corporations, Rupert Murdoch's News Corp, (which was founded in Adelaide but is now based from the United States) and Nine Entertainment – Murdoch-owned titles account for nearly two-thirds (64.2 per cent) of metropolitan circulation and Nine-owned papers account for a further quarter (26.4 per cent).