Question: What is the explanation for why the average forecasting errors were higher for the other time series forecasting methods than for the supposedly less powerful

What is the explanation for why the average forecasting errors were higher for the other time series forecasting methods than for the supposedly less powerful last-value method?

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What is the explanation for why the average forecasting errors were higher for the other time series forecasting methods than for the supposedly less powerful last-value method?

What is the explanation for why the average forecasting errors were higher for the other time- series forecasting methods than for the supposedly less powerful last-value method?

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