kurtosis

(redirected from Leptokurtic distribution)
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Related to Leptokurtic distribution: Mesokurtic, skewness, Excess kurtosis

kurtosis

 [ker-to´sis]
the degree of peakedness or flatness of a probability distribution, relative to the normal distribution with the same variance. See illustration.
Kurtosis. From Dorland's, 2000.

kur·to·sis

(kŭr-tō'sis),
The extent to which a unimodal distribution is peaked.
[G., an arching]

kurtosis

[kerto′sis]
the degree of peakedness or flatness of a probability distribution relative to the normal distribution with the same variance.

kurtosis

the quality of peakedness in a unimodal distribution. Abnormalities are leptokurtosis where values are clustered about the mean and the tails of the curve, and platykurtosis where the clustering produces a plateau-shaped curve.
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References in periodicals archive ?
The recent financial crisis has underscored the importance of active responses to extreme tail risks that are associated with a leptokurtic distribution of key monetary variables and stem from their volatility outbursts (Orlowski, 2010b).
If the estimated GED parameter is less than 2, leptokurtic distribution is detected.
This is the defining property of leptokurtic distributions and is the fundamental reason why the counter-intuitive approach adopted here seems to produce a low risk portfolio according to a required rate of return, with far fewer stocks than the mean-variance approach.
It would make sense that a stock in a sector that experiences boom and bust cycles would have underlying leptokurtic distributions of returns.
With respect to kurtosis, all the markets demonstrated leptokurtic distributions.
Thus, leptokurtic distributions seem more appropriate to describe the data for each country.
Empirical evidence indicates that the Student-t is able to fit leptokurtic distributions relatively well.
This occurs because extremely leptokurtic distributions of effects decrease the frequency of mutations with effects in the class that is most damaging (i.
Spatial contact models incorporate a variety of contact distributions, including the leptokurtic distributions that are so prevalent in the dispersal data.