Neural networks and seasonality: Some technical considerations

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Abstract

Debate continues regarding the capacity of feedforward neural networks (NNs) to deal with seasonality without pre-processing. The purpose of this paper is to provide, with examples, some theoretical perspective for the debate. In the first instance it considers possible specification errors arising through use of autoregressive forms. Secondly, it examines seasonal variation in the context of the so-called 'universal approximation' capabilities of NNs, finding that a short (bounded) sinusoidal series is easy for the network but that a series with many turning points becomes progressively more difficult. This follows from results contained in one of the seminal papers on NN approximation. It is confirmed in examples which also show that, to model seasonality with NNs, very large numbers of hidden nodes may be required. © 2006 Elsevier B.V. All rights reserved.

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Curry, B. (2007). Neural networks and seasonality: Some technical considerations. European Journal of Operational Research, 179(1), 267–274. https://doi.org/10.1016/j.ejor.2006.03.012

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