Copula‐based semiparametric analysis for time series data with detection limits
Copula‐based semiparametric analysis for time series data with detection limits
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基于 Copula 的半参数分析,用于具有检测限的时间序列数据
DOI:
10.1002/cjs.11503
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Wang, Huixia Judy
中科院分区:
文献类型:
--
作者:
Li, Fuyuan;Tang, Yanlin;Wang, Huixia Judy
The analysis of time series data with detection limits is challenging due to the high‐dimensional integral involved in the likelihood. Existing methods are either computationally demanding or rely on restrictive parametric distributional assumptions. We propose a semiparametric approach, where the temporal dependence is captured by parametric copula, while the marginal distribution is estimated non‐parametrically. Utilizing the properties of copulas, we develop a new copula‐based sequential sampling algorithm, which provides a convenient way to calculate the censored likelihood. Even without full parametric distributional assumptions, the proposed method still allows us to efficiently compute the conditional quantiles of the censored response at a future time point, and thus construct both point and interval predictions. We establish the asymptotic properties of the proposed pseudo maximum likelihood estimator, and demonstrate through simulation and the analysis of a water quality data that the proposed method is more flexible and leads to more accurate predictions than Gaussian‐based methods for non‐normal data.The Canadian Journal of Statistics47: 438–454; 2019 © 2019 Statistical Society of Canada
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DOI:
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发表时间:
2007
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影响因子:
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作者:
Yuguo Chen;Jun S. Liu
通讯作者:
Jun S. Liu
DOI:
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发表时间:
1993-09
期刊:
Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology
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2006
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2011
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发表时间:
2012
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