Galaxy and cluster biasing from Local Group dynamics

Comparing the gravitational acceleration induced on the Local Group of gala xies by different tracers of the underlying density field we estimate, with in the linear gravitational instability theory and the Linear biasing ansat z, their relative bias factors. Using optical SSRS2 galaxies, IRAS (PSCz) g alaxies and Abell/ACO clusters, we End b(O,I) approximate to 1.21 +/- 0.06 and b(C,I) approximate to 4.3 +/- 0.8, in agreement with other recent studi es. Finally, there is an excellent one-to-one correspondence of the PSCz an d Abell/ACO cluster dipole profiles, once the latter is rescaled by b(C,I), out to at least similar to 150 h(-1) Mpc.