  The first section discusses a recalibration of the luminosity-linewidth
technique and its use in a determination of H_0. The recalibration introduces
(i) new cluster calibration data, (ii) new corrections for reddening as a
function of inclination, and (iii) a new zero-point calibration using 13
galaxies with distances determined via the cepheid period-luminosity method. It
is found that H_0=82+/-16 km/s/Mpc (95% confidence). The second section
concerns a dynamic measurement of Omega_0. The non-linear Least Action method
can be used to reconstruct the orbits galaxies have followed to reach their
current positions. The three free parameters of the models are M/L, age of the
Universe, and a measure of the possible extended nature of dark halos compared
with the distribution of light. Models are constrained by 900 observed
distances. Best chi^2 fits are for models with M/L values consistent with
Omega_0=0.25+/-0.2. The concept of `antibiasing' is introduced in an attempt to
reconcile this low estimate of Omega_0 with the results from linear analyses.
It is argued that M/L values in elliptical-rich regions are a factor of 7
larger than those in spiral-rich regions. Hence, whereas it is commonly thought
that there is the bias that mass is more extended than light, there may be a
cosmologically important regime where there is the antibias of mass more
concentrated than light. This possibility makes the inferrance of Omega_0 from
beta unclear.
