Function to compute asymptotic variance of Pickands estimator

Function `asvarQBCC`

computes the asymptotic (co)variance of
a QuantileBCC estimator at a Weibull model.

1 | ```
asvarQBCC( model, p1 = 1/3, p2 = 2/3)
``` |

`model` |
an object of class |

`p1,p2` |
levels of the quantiles; maximal breakdown point is achieved
for |

All terms are analytic.

A 2x2 matrix; the covariance.

Peter Ruckdeschel peter.ruckdeschel@uni-oldenburg.de

1 2 3 | ```
GP <- WeibullFamily(scale=1,shape=0.7)
asvarQBCC(GP)
asvarQBCC(GP, p1=1/4, p2= 5/8)
``` |

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