Melbourne is the capital and most populous city in the state of Victoria, and the second most populous city in Australia. The name "Melbourne" refers to an urban agglomeration area (and census statistical division) spanning 9,900 km2 (3,800 sq mi) that comprises the greater metropolis – as well as being a common name for its metropolitan hub, the Melbourne City Centre. It is a leading financial centre in Australia, as well as the Asia-Pacific region, and has been ranked the world's most livable city since 2011 (and among the top three since 2002), according the Economist Intelligence Unit (EIU). In 2013 the EIU also ranked Melbourne the fourth most expensive city in the world, tying with Oslo, Norway. Melbourne is rated highly in the areas of education, entertainment, healthcare, research and development, tourism and sports.