Ghana is a country located in Western Africa. Neighboring countries include Burkina Faso, Cote d'Ivoire, Togo, and the Gulf of Guinea. Lake Volta, the largest artificial lake in the world, is located entirely within Ghana. The government system is a constitutional democracy; the chief of state and head of government is the president. Ghana has a mixed economic system which includes some private freedom, combined with weak centralized economic planning and government regulation. Ghana is a member of the Economic Community of West African States (ECOWAS).