15.1 Some Facts in Business-Cycle Business cycle is similar, and the time series data express common rules, which includes o Output fluctuations are related to each other through different departments with time serial relation; o Industry product, consumption and investment fluctuate simul taneously with cycle, and also the government buy o Investment changes much more severely than consumption; O Employment is with the cycle while unemployment is against cycle o Real wage and average productivity is with the cycle, and the former is only slightly; o Currency supply and stock price is with cycle and lead other elements; o Inflation and nominal interest is with cycle and lag o Real interest is not seasonal 友学经济学院15.1 Some Facts in Business-Cycle ❖ Business cycle is similar, and the time series data express common rules, which includes :  Output fluctuations are related to each other through different departments with time serial relation；  Industry product, consumption and investment fluctuate simultaneously with cycle, and also the government buy；  Investment changes much more severely than consumption；  Employment is with the cycle while unemployment is against cycle；  Real wage and average productivity is with the cycle, and the former is only slightly；  Currency supply and stock price is with cycle and lead other elements；  Inflation and nominal interest is with cycle and lag；  Real interest is not seasonal