Chen, Ji; Tong, Kang; Yu, Qinglin; Chen, Sichao; … - In: Journal of innovation & knowledge : JIK 11 (2026), pp. 1-16
(TVP-SSM). In this framework, search engine data (SED) are used to construct exogenous variables, intervention variables … October 1, 2019, to October 28, 2021, and identified the COVID-19 pandemic as an external shock. The results show that TVP-SSM …, the prediction accuracy of TVP-SSM with intervention variables and periodical variables (TVP-SSM-1) exceeds that of …