Time-Varying Mixture Copula Models with Copula Selection
Time-Varying Mixture Copula Models with Copula Selection
复制标题
具有 Copula 选择的时变混合 Copula 模型
DOI:
10.5705/ss.202020.0005
复制
发表时间:
2021
影响因子:
1.4
通讯作者:
Guannan Liu
中科院分区:
文献类型:
--
作者:
Bingduo Yang;Zongwu Cai;Christian Hafner;Guannan Liu
Modeling the joint tails of multiple financial time series has many important implications for risk management. Classical models for dependence often encounter a lack of fit in the joint tails, calling for additional flexibility. This paper introduces a new semiparametric time-varying mixture copula model, in which both weights and dependence parameters are deterministic and unspecified functions of time. We propose penalized time-varying mixture copula models with group smoothly clipped absolute deviation penalty functions to do the estimation and copula selection simultaneously. Monte Carlo simulation results suggest that the shrinkage estimation procedure performs well in selecting and estimating both constant and time-varying mixture copula models. Using the proposed model and method, we analyze the evolution of the dependence among four international stock markets, and find substantial changes in the levels and patterns of the dependence, in particular around crisis periods.
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影响因子:
1.9
作者:
Elif F. Acar;Radu V. Craiu;Fang Yao
通讯作者:
Elif F. Acar;Radu V. Craiu;Fang Yao
DOI:
10.1016/j.jmva.2017.11.004
发表时间:
2018-05
期刊:
J. Multivar. Anal.
影响因子:
--
作者:
J. Fermanian;O. Lopez
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J. Fermanian;O. Lopez
DOI:
10.1016/b978-0-444-62731-5.00016-6
发表时间:
2013
期刊:
--
影响因子:
--
作者:
Andrew J. Patton
通讯作者:
Andrew J. Patton
DOI:
10.2139/ssrn.891172
发表时间:
2006-03
期刊:
--
影响因子:
--
作者:
Georges Tsafack Kemassong
通讯作者:
Georges Tsafack Kemassong
DOI:
10.1080/01621459.2013.873366
发表时间:
2014-06-01
影响因子:
3.7
作者:
Cai, Zongwu;Wang, Xian
通讯作者:
Wang, Xian