#m249 #mathematics #open-university #statistics #time-series
Consider the multiplicative model X
t = m
t × s
t × W
t .Let Y
t denote the time series of logarithms: Y
t =log X
t .Then
- Yt =log Xt
- Yt= log(mt × st × Wt)
- Yt= log mt +log st +log Wt .
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