Use the following commands to simulate a two-regime TAR(1) model with 400 observations. (a) Obtain a time
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Use the following commands to simulate a two-regime TAR(1) model with 400 observations.
(a) Obtain a time plot for the data and its sample autocorrelation function with 12 lags.
(b) Obtain a scatter plot of xt versus xt−1 and draw a smooth line on the plot using the loess local smoothing.
(c) Apply the threshold tests of Chapter 1 to confirm the threshold nonlinearity of the time series.
(d) Finally, build a two-regime TAR model for the series and write down the fitted model.
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