In this paper, we consider using a semiparametric regression approach to modelling non-linear autoregressive time series. Based on a finite series approximation to non-parametric components, an adaptive selection procedure for the number of summands in the series approximation is proposed. Meanwhile, a large sample study is detailed and a small sample simulation for the Mackey-Glass system is presented to support the large sample study.
- Non-linear time series
- Partly linear additive autoregressive model
- Semiparametric regression smoothing