伦敦政治经济学院统计系主任、我校客座教授、金融统计研究所所长-姚奇伟教授来我校作学术报告
发布者：系统管理员发布时间：2010-12-27浏览次数：2430
| 12月21日下午伦敦政治经济学院统计系主任,我校客座教授，金融统计研究所所长，姚奇伟教授来我系做了题为Factor Modelling for Times Series: A Dimension-Reduction Approach的学术报告，给我系师生介绍了：Following a brief survey on the factor models for multiple time series in econometrics, we introduce a statistical approach from the viewpoint of dimension reduction. Our method can handle nonstationary factors. However under stationary settings, the inference is simple in the sense that the estimation for both the factor dimension and the loadings is resolved by an eigenanlysis for a non-negative definite matrix, and is therefore applicable when the dimension of time series is in the order of a few thousands. Asymptotic properties of the proposed method are investigated. In particular, our estimators for zero-eigenvalues enjoy the faster convergence rates even when the dimension goes to infinity together with the sample size. Numerical illustration with both simulated and real data will also be reported. |
