...Ran Wang; Yunbao Xu; Qinwen Yang Purpose This paper intends to construct a new adaptive grey seasonal model (AGSM) to promote the application of the grey forecasting model in quarterly GDP. Design/methodology/approach Firstly, this paper constructs a new accumulation operation that embodies...

...Chong Liu; Wanli Xie; Tongfei Lao; Yu-ting Yao; Jun Zhang Purpose Gross domestic product (GDP) is an important indicator to measure a country's economic development. If the future development trend of a country's GDP can be accurately predicted, it will have a positive effect on the formulation...