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Mohammadzadeh, Mohsen, Ebrahimi, Nasrin, Cortese, Giuliana. (1401). Copula Functions for Spatial Survival Data Analysis. , 34(1), 35-42. doi: 10.22059/jsciences.2023.350366.1007763
Mohsen Mohammadzadeh; Nasrin Ebrahimi; Giuliana Cortese. "Copula Functions for Spatial Survival Data Analysis". , 34, 1, 1401, 35-42. doi: 10.22059/jsciences.2023.350366.1007763
Mohammadzadeh, Mohsen, Ebrahimi, Nasrin, Cortese, Giuliana. (1401). 'Copula Functions for Spatial Survival Data Analysis', , 34(1), pp. 35-42. doi: 10.22059/jsciences.2023.350366.1007763
Mohammadzadeh, Mohsen, Ebrahimi, Nasrin, Cortese, Giuliana. Copula Functions for Spatial Survival Data Analysis. , 1401; 34(1): 35-42. doi: 10.22059/jsciences.2023.350366.1007763

Copula Functions for Spatial Survival Data Analysis

Journal of Sciences, Islamic Republic of Iran
مقاله 5، دوره 34، شماره 1، خرداد 2023، صفحه 35-42    اصل مقاله (551.77 K)
نوع مقاله: Original Paper
شناسه دیجیتال (DOI): 10.22059/jsciences.2023.350366.1007763
نویسندگان
Mohsen Mohammadzadeh* 1؛ Nasrin Ebrahimi1؛ Giuliana Cortese2
11 Department of Statistics‎, ‎Tarbiat Modares University‎, ‎Tehran‎, ‎Islamic Republic of Iran
22 Department of Statistical Sciences‎, ‎Padua University‎, ‎Italy
چکیده
Many survival data analyses aim to assess the effect of different risk factors on survival time‎. ‎In some studies‎, ‎the survival times are correlated‎, ‎and the dependence between survival times is related to their spatial locations‎. ‎Identifying and considering the dependence structure of data is essential in survival modeling‎. ‎The copula functions are helpful tools for incorporating data dependencies‎. ‎So‎, ‎one may use these functions for modelling spatial survival data‎. ‎This paper presents a model for spatial survival data by the Gumbel-Hougaard copula function‎. ‎A two-stage estimator using a composite likelihood function is used to estimate regression and dependence parameters‎. ‎A simulation study investigates the performance of the model‎. ‎Finally‎, ‎the proposed model is applied to model a set of COVID-19 data.
کلیدواژه‌ها
Spatial Survival Data؛ Copula Function؛ Composite Likelihood؛ Frailty Models؛ Two-Stage Estimator
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