Results 41 to 50 of about 19,478 (209)
Dependence Modeling, 2013 We study the impact of certain transformations within the class of Archimedean copulas. We give some admissibility conditions for these transformations, and define some equivalence classes for both transformations and generators of Archimedean copulas ...
Di Bernardino Elena, Rullière Didier
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A New Family of Archimedean Copulas: The Half-Logistic Family of Copulas
Mathematics, 2023 In this research, we introduce a truncation of the half-logistic distribution function as a multiplicative Archimedean generator. The corresponding Archimedean copula is obtained, namely the half-logistic family.
Abdulhamid A. Alzaid, Weaam M. Alhadlaq
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Vine copula knockoffs for variable selection in gene expression studies
Canadian Journal of Statistics, EarlyView.Abstract Identifying clinical and genetic markers is essential for stratifying cancer patients by survival outcomes and guiding personalized treatment strategies. However, gene expression studies often involve high‐dimensional predictors with mixed data types and complex dependence, which complicates reliable variable selection.
José Ulises Márquez Urbina +3 more
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On Truncation Invariant Copulas and their Estimation
Dependence Modeling, 2017 The paper deals with the family of irreducible left truncation invariant bivariate copulas, which admit a nontrivial lower tail dependence function. Such copulas, similarly as the Archimedean ones, are characterized by a functional parameter, a generator
Jaworski Piotr
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International Journal of Climatology, EarlyView.The changes in joint return period of compound meteorological hot‐dry (CMHHE) and hot‐wet (CMHWE) and compound hydrological hot‐dry (CHHDE) and hot‐wet (CHHWE) extremes were attributed to changes in associated univariate extremes and their dependence.
Ruting Yang +6 more
wiley +1 more source
Managing Procurement Auction Failure: Bid Requirements or Reserve Prices?
The RAND Journal of Economics, EarlyView.ABSTRACT This paper examines bid requirements, where the government may cancel a procurement contract unless two or more bids are received. Using a first‐price auction model with endogenous entry, we compare the bid requirement and reserve price mechanisms in terms of auction failure and procurement costs.
Jun Ma, Vadim Marmer, Pai Xu
wiley +1 more source
Proving the characterization of Archimedean copulas via Dini derivatives [PDF]
, 2006 summary:In this note we prove the characterization of the class of Archimedean copulas by using Dini ...
Úbeda-Flores, Manuel +8 more
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Archimedean Copulas: A Useful Approach in Biomedical Data—A Review with an Application in Pediatrics
StatsMany applications in health research involve the analysis of multivariate distributions of random variables. In this paper, we review the basic theory of copulas to illustrate their advantages in deriving a joint distribution from given marginal ...
Giulia Risca +5 more
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Optimal Hedging Strategies in the Low‐Sulphur Bunker Fuel Landscape
European Financial Management, EarlyView.ABSTRACT The IMO2020 regulation for the green transition in shipping turned the industry into using two compliant bunker fuels: very low‐sulphur fuel oil (VLSFO) and low‐sulphur marine gas oil (LSMGO). VLSFO futures contracts introduced in late 2019 and other energy‐related futures contracts indicate that the VLSFO contracts trading on the Singapore ...
Xiwen Bai +2 more
wiley +1 more source
Dependence Modeling, 2018 The family of Clayton copulas is one of the most widely used Archimedean copulas for dependency measurement. A major drawback of this copula is that when it accounts for negative dependence, the copula is nonstrict and its support is dependent on the ...
Cooray Kahadawala
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