珍妮特·耶伦是美国当代著名女经济学家,现任美国联邦储备委员会主席。她的研究涉猎广泛,从失业与劳动力市场、新凯恩斯主义经济学的微观基础、货币与财政政策到国际贸易与投资政策等领域。她是典型的凯恩斯主义学者,并为建立新凯恩斯主义经济学的微观基础做出了卓著的贡献。本文介绍耶伦在劳动力市场的失业、新凯恩斯主义经济学的微观基础和宏观经济政策等方面的贡献。耶伦强调现实因素在经济理论中的重要性,在经济理论发展过程中注重理论的微观基础和严密的逻辑推导。耶伦的贡献不仅推进了这些领域的理论研究进展,而且对公共政策的设计、实施乃至美国经济产生了直接影响。 Janet Yellen is a famous contemporary American economist and currently serves as chairman of the Federal Reserve. Her research covers a wide range of topics ranging from unemployment and the labor market, the micro-foundations of New Keynesian economics, monetary and fiscal policies to international trade and investment policies. She is a quintessential Keynesian scholar and has made an outstanding contribution to establishing the micro-foundations of New Keynesian economics. This article describes Yellen’s contribution to unemployment in the labor market, the micro-foundation of New Keynesian economics and macroeconomic policy. Yellen emphasized the importance of realistic elements in economic theory and paid attention to the micro-foundation of theory and strict logical derivation in the development of economic theory. The contribution of Yellen not only advances the theoretical research in these fields, but also has a direct impact on the design and implementation of public policies and the U.S. economy.