Singapore has "one of the most successful healthcare systems in the world, in terms of both efficiency in financing and the results achieved in community health outcomes," according to an analysis by global consulting firm Towers Watson.[5] The government regularly adjusts policies to actively regulate "the supply and prices of healthcare services in the country" in an attempt to keep costs in check. However, for the most part the government does not directly regulate the costs of private medical care. These costs are largely subject to market forces, and vary enormously within the private sector, depending on the medical specialty and service provided.