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Optimal Forecasting of Noncausal Autoregressive Time Series

Lanne, Markku and Luoto, Jani and Saikkonen, Pentti (2010): Optimal Forecasting of Noncausal Autoregressive Time Series.

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Abstract

In this paper, we propose a simulation-based method for computing point and density forecasts for univariate noncausal and non-Gaussian autoregressive processes. Numerical methods are needed to forecast such time series because the prediction problem is generally nonlinear and no analytic solution is therefore available. According to a limited simulation experiment, the use of a correct noncausal model can lead to substantial gains in forecast accuracy over the corresponding causal model. An empirical application to U.S. inflation demonstrates the importance of allowing for noncausality in improving point and density forecasts.

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