Applied & Financial Mathematics |
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Extreme value distributions of mixing two sequences with different MDA\'s |
JIANG Yue-xiang |
College of Economics, Zhejiang University, Hangzhou 310027, China |
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Abstract Suppose {Xi, i≥1} and {Yi, i≥1} are two independent sequences with distribution functions FX(x) and FY(x), respectively. Zi,n is the combination ofXi and Yi with a probability pn for each i with 1≤i≤n. The extreme value distribution GZ(x) of this particular triangular array of the i.i.d. random variables Z1,n, Z2,n, ..., Zn,n is discussed. We found a new form of the extreme value distribution ΛA(ρx)Λ(x) (0<ρ<1), which is not max-stable. It occurs if FX(x) and FY(x) belong to the same MDA(Λ). GZ(x) does not exist as mixture forms of the different types of extreme value distributions.
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Received: 18 March 2003
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