statsmodels.genmod.families.links.InversePower.deriv2¶ InversePower.deriv2(p)¶ Second derivative of the power transform Parameters:¶ p : array_like¶Mean parameters Returns:¶ g’’(p) – Second derivative of the power transform of p Return type:¶ ndarray Notes g’’(p) = power * (power - 1) * p`**(`power - 2)