Nevertheless, South Africa is falling behind other emerging markets, such as India and China, owing to several factors: the country is relatively small, without the advantage of a huge domestic customer base; it has had for decades an unusually low rate of saving and investment, partly because of low disposable income; an inadequate education system results in an acute shortage of skilled manpower; a strong and volatile currency deters investors and makes its exports less competitive; the infrastructure, though far better than in the rest of Africa, suffers from severe bottlenecks, including scheduled power shortages, and urgently needs upgrading.