Migration to and from Ghana has been predominantly regional in scope, but this deportation also marked the beginning of a broader dispersion of Ghanaian emigration, with many highly-skilled workers moving further afield in search of employment to countries such as Germany, the United Kingdom and the United States. Many Nigerians have been involved in trade in diamonds, vehicles, building materials and related activities. Nigerian banks, telecommunication and other companies have also invested in the Ghanaian economy.