Abstract
Business cycle theory is always a research focus during the last couple of decades as a tool to explain the fluctuation in economic growth. In chronological order, this review sorts out the theories trying to explain the business cycle into five main influential schools of economics based on previous studies: Keynesian economics, Monetarism, New classical economics, Real business cycle theory, and New Keynesian economics. This review summarizes these theories respectively, introducing their origins, main mechanism, related models and empirical evidence, drawbacks, and challenges they face from other economists. Meanwhile, this review also compares the differences and similarities between each theory from three aspects: the determinant of aggregate production, the driving force of the business cycle dynamics, and the effectiveness of fiscal and monetary policies. The motivation is to gain a general view of modern business cycle theory to provoke thinking in long-term growth and short-term fluctuations in economic activities to support further research.
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