Let (X,A) and (Y,B) be measurable spaces. Supposewe are given a probability α on A, a probability β on B and a probability μ on the product σ-field A ⊗ B. Is there a probability ν on A⊗B, with marginals α and β, such that ν ≪ μ or ν ~ μ ? Such a ν, provided it exists, may be useful with regard to equivalent martingale measures and mass transportation. Various conditions for the existence of ν are provided, distinguishing ν ≪ μ from ν ~ μ.
@article{bwmeta1.element.doi-10_1515_demo-2015-0004, author = {Patrizia Berti and Luca Pratelli and Pietro Rigo and Fabio Spizzichino}, title = {Equivalent or absolutely continuous probability measures with given marginals}, journal = {Dependence Modeling}, volume = {3}, year = {2015}, zbl = {1328.60007}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.doi-10_1515_demo-2015-0004} }
Patrizia Berti; Luca Pratelli; Pietro Rigo; Fabio Spizzichino. Equivalent or absolutely continuous probability measures with given marginals. Dependence Modeling, Tome 3 (2015) . http://gdmltest.u-ga.fr/item/bwmeta1.element.doi-10_1515_demo-2015-0004/
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