Media type: E-Article Title: Multiple-index Nonstationary Time Series Models: Robust Estimation Theory and Practice Contributor: Dong, Chaohua; Gao, Jiti; Peng, Bin; Tu, Yundong Published: Elsevier BV, 2021 Published in: SSRN Electronic Journal (2021) Language: English DOI: 10.2139/ssrn.3955490 ISSN: 1556-5068 Keywords: Pharmacology (medical) Origination: Footnote: