Geographic Concentration and Increasing Returns
基于新国际贸易理论的实证模型，检验递增报酬是美国和欧洲经济地理集中背后的驱动力，并评述了分离和检验不同理论范式的计量方法。
Abstract. Economic activities are highly clustered. Why is geographic concentration becoming a predominant feature of industrialized economies? On the basis of the empirical models developed by the new theories of international trade, our answer is that increasing returns are the driving force of economic geography in the US as well as in Europe. In so doing, we review several econometric methods proposed in the literature to separate and to test alternative theoretical paradigms.