Name any country in Africa, and I could have found a world-class firm there a decade ago. The problem is, two years later, I’d go back and still find just the one firm. In Cambodia or Vietnam, I would go back and find 50 new ones.
A lot depends on what you do with the investment you attract. [If Ghana sells bond after bond so it can build a string of gold-plated palaces, not so helpful. But if, after Nigeria updates its GDP, foreign investors fly to Lagos to meet up with the app designers at Pledge 51, that's clearly a good thing.] That's one of the good examples of where this can have a positive impact.
Africa has made a number of impressive improvements through a combination of better economic policies and higher raw materials prices. We can be cautiously optimistic. Optimistic, because of new minerals discoveries. Cautious, because growth based only on raw materials is fragile.