An Adaptive Kernel-Based Structural Change Test for Copulas
基于自适应核方法的 Copula 结构变化检验AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要明确检验依赖结构的平滑转变、周期性变化与突发结构断点,直接对应结构变化方向。
基于自适应核方法的 Copula 结构变化检验AI 解读 ↓
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This article proposes a structural change test for copula models based on the kernel smoothing method. The proposed approach enables adaptable estimation of the dynamic marginal distributions, either parametrically or semi-parametrically. The test statistic is formulated via the weighted quadratic distance between the local smoothing copula and the empirical copula function, using pseudo-observations of marginal distributions. The test statistic is pivotal with an asymptotic standard Normal distribution, irrespective of the marginal distributions, parameters, and estimations, and is consistent against a wide range of smoothly transitioning structural changes as well as abrupt structural breaks for copula models. Monte Carlo simulations show that the test performs well in finite samples and outperforms existing tests in the case of periodic changes.
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