  The recent discovery of a correlation between nuclear black hole mass, M_bh,
and the stellar velocity dispersion (Gebhardt et al. 2000, Ferrarese and
Merritt 2000), in elliptical galaxies and spiral bulges, has raised the
question whether such a relationship exists for AGN. Estimates of M_bh for many
AGN, made using reverberation mapping techniques, allow exploration of the
relationship between black hole mass, the host galaxy and the energetics of
nuclear emission. However, since only a few AGN have both M_bh and velocity
dispersion measurements, we use the [OIII] 5007 emission line widths on the
assumption that for most AGN the forbidden line kinematics are dominated by
virial motion in the host galaxy bulge. We find that a relation does exist
between M_bh and [OIII] line width for AGN which is similar to the one found by
Gebhardt et al. 2000, although with more scatter as expected if secondary
influences on the gas kinematics are also present. Our conclusion is that both
active and inactive galaxies follow the same relationship between black hole
mass and bulge gravitational potential. We find no compelling evidence for
systematic differences in the mass estimates from reverberation mapping and
stellar dynamics. We also find that for radio quiet AGN the radio power and
black hole mass are highly correlated linking emission on scales of kiloparsecs
with the nuclear energy source.
