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 } \leq - 20 mag , where M _ { \ast } \simeq - 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 + \epsilon ) } with r _ { 00 } = 5.08 \pm 0.08 { h ^ { -1 } \hbox { Mpc } } , \epsilon = 0.02 \pm 0.23 and \gamma = 1.81 \pm 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 \epsilon = 0.9 \pm 0.3 and \epsilon = -0.5 \pm 0.2 , respectively , with r _ { 00 } \simeq 5 { h ^ { -1 } \hbox { Mpc } } in all cases .