Contours of equal Bayesian likelihood as a function of parameters β and μ for our best-fitting model (Eq. (3)). The panel on the left corresponds to the full Lick sample, while the panel on the right corresponds to the subsample. In both cases no correlations between the parameters β (related to metallicity) and μ (related to mass) can be seen, indicating that the giant planet occurrence rate indeed depends on both, stellar mass and metallicity.