许多观察家们声称，全球化与科技的结合为美国经济创造了全新的经济运行规律，但是撰写此文的经济学家认为传统的经济学理论仍然能很好地解释近来发生的经济现象。近年来经济上出人意料的强劲表现，引发了一场关于美国经济变迁的广泛争论。来自学术界、商界及政界的观察家们声 Many observers claim that the combination of globalization and science and technology has created a completely new law of economic operation for the U.S. economy. However, the economist who wrote this article believes that traditional economic theories still provide a good explanation of the recent economic phenomena. The surprisingly strong economic performance in recent years has sparked a widespread debate over the economic changes in the United States. Observers from academia, business and politics sound