讲座时间:2017年10月20日(周五),下午2:00-3:30
2017年10月21日(周六),下午2:00-3:30
讲座地点:教学楼E座209
讲座嘉宾:Timo Teräsvirta教授,芬兰社会科学院院士、瑞典皇家科学院院士
讲座主题: Modelling Volatility by Variance Decomposition
Abstract:
In this paper, we propose two parametric alternatives to the standard GJR-GARCH model of Glosten et al. (1993), based on additive and multiplicative decompositions of the variance. They allow the variance of the model to have a smooth time-varying structure. The suggested parameterizations describe structural change in the conditional and unconditional variances where the transition between regimes over time is smooth. The main focus is on the multiplicative decomposition of the variance into an unconditional and conditional components. Estimation of the multiplicative model is discussed in detail. An empirical application to daily stock returns illustrates the functioning of the model. The results show that the‘long memory type behaviour’ of the sample autocorrelation functions of the absolute returns can also be explained by deterministic changes in the unconditional variance.
嘉宾简介
Timo Teräsvirta教授,毕业芬兰赫尔辛基大学(University of Helsinki),获计量经济学博士学位,现为芬兰社会科学院院士、瑞典皇家科学院院士、诺贝尔奖评审委员会委员、国际预测研究院会士、国际著名计量经济学家,主要从事非线性时间序列计量经济学、经济预测、宏观经济波动性研究,在国际权威SSCI、SCI杂志上发表论文100多篇。曾荣获芬兰E.J. Nyström’s 奖、芬兰国家科技奖、丹麦科学研究奖、芬兰国家一等骑士白玫瑰勋章等荣誉称号,入选世界名人录、欧洲名人录、芬兰名人录、瑞典名人录、世界科学和工程学名人录、环球经济科学名人录等。