Results of Monte Carlo simulations of the reverberation mapping AGN sample. Panels from left to right: (1) M_•-M_Bulgerelation for a Monte Carlo realisation of 100 objects. The dashed line shows the input relation, the solid line the mean best fit for 1000 realisations; (2) distribution of recovered zero points of the M_•-M_Bulgerelation. The horizontal line shows the input; (3) same for the slope of the relation; (4) same for the intrinsic scatter in the relation. There is an offset in the zero point of  ~ 0.1 dex. The slope and intrinsic scatter are not strongly affected.