Time Irreversibility and Business Cycle Asymmetry
提出一个时域时间可逆性检验（TR检验），并应用于两个代表性宏观经济数据集，发现时间不可逆性是常态，表明经济周期的许多成分存在不对称波动，主要表现为陡峭不对称。
The problem of business-cycle symmetry is addressed within the context of time reversibility. To this effect, the authors introduce a time domain test of time reversibility, the TR test. In an application, they show that time irreversibility is the rule rather than the exception for two well-known representative macroeconomic data sets. This shows that many components of the business cycle have asymmetric fluctuations. The characterization of asymmetry provided by the TR test shows that many series exhibit steepness asymmetry. A few series appear to be either deep or sharp. Copyright 1996 by Ohio State University Press.