JOHANNESBURG, Jan 25- Emerging economies, including many in Africa, are enjoying some of the strongest GDP growth rates in the world but much of this growth is an illusion and could be detrimental over the long term, a new book says. Its author, Lorenzo Fioramonti, is associate professor of political science at South Africa's University of Pretoria.
*Growth outlook for Greece, Portugal, Ireland cut. LONDON, Jan 16- Spain, Greece and Portugal face a tougher 2013 than previously thought, while the outlook for growth in Ireland, the only bright spot among the euro zone's most vulnerable economies, was cut for the first time in nearly a year.