  The correlation evolution of a high luminosity subsample of the CNOC2
redshift survey is examined. The sample is restricted to galaxies for which the
k corrected and evolution corrected R luminosity is M_R <=-20 mag, where M_* ~=
-20.3 mag. This subsample contains about 2300 galaxies. In consort with 13000
galaxies in a similarly defined low redshift sample from the Las Campanas
Redshift survey we find that the comoving correlation can be described as
xi(r|z) = (r_00/r)^gamma (1+z)^{-(3+e)} with r_00=5.08 +/- 0.08/h Mpc, e=0.02
+/- 0.23 and gamma=1.81 +/- 0.03 over the z=0.03 to 0.65 redshift range in a
cosmology with Omega_M=0.2, Lambda=0. The measured clustering amplitude, and
its evolution, are dependent on the adopted cosmology. The evolution rates for
Omega_M=1 and flat low density models are e=0.9 +/- 0.3 and e=-0.5 +/- 0.2,
respectively, with r_00 ~= 5/h Mpc in all cases.
