A gold rush theory of economic development
提出一个区域发展理论，其中区域的第一自然特征并不唯一决定发展结果，社会学习关于未知区域特征的过程会自我强化，形成区域发展差异。
I present a stylized theory of regional development in which regional ‘first nature’ characteristics do not map uniquely into regional outcomes. The ‘second nature ’ force is social learning about fixed but unknown regional characteristics which can bring about self-reinforcing regional development. The key difference from other agglomer-ation economies is that the extent of local economic activity only influences beliefs about productivity but not actual productivity so that there are no localized external increasing returns.