Clark Ken' (1991) reviewed a range of evidence on the idea that education is the key to a nation's international competitiveness. He concluded that probably in no other area of policy-making have so many firm convictions held by so many been based on so little proof A good education system is one, but only one, prerequisite for a successful economy and a more equitable society. Other inputs are required, and in their absence education is unlikely to be able to achieve the goals set for it by policy-makers. Some of the other inputs required to bring this about include: