The knowledge of price and the price of knowledge

Abstract Social science is enmeshed from the outset in an interaction between individual agents, collective action and analytical response. The desire to implement policy and create a preferred outcome provides further complication. There is a fundamental confusion between knowledge in the system and knowledge about it. Classical market analysis divorces the two; in practice agents use both. Moreover, they use their knowledge to change the system. A given set of rules may therefore produce a variety of outcomes. Unless this phenomenon is better understood and analysed, policy-making will continue to produce unexpected and indeed undesired outcomes. Complex systems approaches offer a way forward into these issues which is beginning to bear fruit in thinking clearly about how systems can and should be analysed.