Question: Choose a model with a cubic polynomial trend and a model with an exponential trend. For both models, compute the first and second unconditional moments

Choose a model with a cubic polynomial trend and a model with an exponential trend. For both models, compute the first and second unconditional moments (mean, variance, and autocovariances). Are these processes covariance stationary? Why or why not?

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A model with a cubic polynomial trend is specified as follows Unconditional mean Uncon... View full answer

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