returns the cumulative excess hazard for an TNEH model in case of parametrization of log the of the time to null excess hazard as function to fit the data
cumLexc_mul(z_tau, z_alpha, x, theta)
An object of class numeric containing the cumulative excess hazard with the same length as the time.
covariates depending on tau
covariates depending on alpha
time value
of the coefficient of tneh parameters