2. Which of Rosen’s statements about Country B is least likely correct?
Statement 1: Useful historical data may exist on only a few business cycles, which may not include periods of negative rates.
Statement 2: Forecasting must account for differences between the current environment and historical averages, which may be even less reliable than usual.
Statement 3: Quantitative models, especially statistical models, tend to be stable in situations that differ from those on which they were estimated or calibrated.
不知道考哪个知识点。。。? 麻烦逐一解释一下为啥对错？
