As prediction tools, smooth support vector machines (SSVM) is adopted.SSVM outstands on classification and prediction in recent years, but has not been applied to spread studying yet.

• 在预测工具的选择上，则采用近年来于分类、预测领域表现杰出，却尚未被应用于价差实证研究之平滑支撑向量机(SSVM)作为本研究之预测工具。