Blomqvist's beta from a copula — morie_blomqvist

\(\beta = 4 C(1/2, 1/2) - 1\): the medial correlation, which depends on the copula only at the centre and is therefore blind to tail behaviour. Mirrors morie.fn.blncop.

Usage

morie_blomqvist_beta(family, theta = NULL, nu = NULL)

Arguments

family: copula family.
theta: parameter.
nu: t degrees of freedom.

Value

list: beta, c_half, family, theta, method.

References

Blomqvist, N. (1950). Ann. Math. Statist. 21(4), 593-600.

Examples

morie_blomqvist_beta("clayton", 5)$beta
#> [1] 0.7465937