  A new analysis of the connection between black-hole mass and radio luminosity
in radio-selected flat-spectrum quasars (FSQ) is presented. In contrast to
recent claims in the literature, we find no evidence that the black-hole masses
of radio-selected FSQ are systematically lower that those of luminous
optically-selected radio-loud quasars. The black-hole masses of the FSQ are
estimated via the virial black-hole mass estimator which utilizes the
line-width of the H$\beta$ emission line as a tracer of the central
gravitational potential. By correcting for the inevitable effects of
inclination, incurred due to the FSQ being viewed close to the line of sight,
we find that the black-hole masses of the FSQ with intrinsically powerful radio
jets are confined, virtually exclusively, to M_bh > 10^8 M_solar. This is in
good agreement with previous studies of optically selected FSQ and
steep-spectrum radio-loud quasars.
  Finally, following the application of a realistic Doppler boosting
correction, we find that the FSQ occupy a wide range in intrinsic radio
luminosity, and that many sources would be more accurately classified as
radio-intermediate or radio-quiet quasars. This range in radio luminosity
suggests that the FSQ are fully consistent with an upper boundary on radio
power of the form L_5GHz \propto M_bh^2.5.
