下面几个概念都是英文教材上出现的,想请问分别都对应着的中文说法是什么?疑点在蓝字。1. causal invertibility
2. causality of ARMA(p,q)
3. a penalized LS-criterion
4./5. HP filtered business cycle component,works similar to a high pass filter picking up cyclic movements with frequencies above pi/20 (i.e. with duration less than 10 years - see Fourier transform of transfer function).
这里,经过HP虑子处理后的时间序列,指1)过滤后只剩下经济周期,还是2)过滤掉经济周期,时间序列只剩下趋势?
另外high pass 怎么理解呢?
先谢谢了!


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