Finally, some comparisons are prov ided between Krugman's ideas and the conventional economic geography. 最后，对克鲁格曼经济地理学与常规地理学的不同之处作以比较。
He opened up the study of trade under increasing returns and imperfect competition and later resuscitated the study of economic geography. 他开创了在收益递增和不完全竞争框架下的贸易理论，之后又复兴了经济地理学的研究。
