Let X be a d-dimensional standardized random variable (E(X) = 0, cov(X) = 1). Then for a multivariate analogue of skewness s = E (parallel-to X parallel-to 2X) and kurtosis k = EXX(T)XX(T)-(d+2)I we show that parallel-to s parallel-to 2 < tr k + 2d. For infinitely divisible distributions parallel-to s parallel-to 2 less-than-or-equal-to tr k.
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UTS Business School, University of Technology, Sydney, PO Box 123, BroadwayUTS Business School, University of Technology, Sydney, PO Box 123, Broadway
Hall A.D.
Satchell S.E.
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Trinity College, Cambridge, University of SydneyUTS Business School, University of Technology, Sydney, PO Box 123, Broadway