  We analyzed the effects of having a close companion on the star formation
activity of galaxies in 8K galaxy pair catalog selected from the 2dFGRS. We
found that, statistically, galaxies with $r_{\rm p} < 25 {\rm h^{-1}}$ kpc and
$\Delta V < 100 {\rm km/s}$ have enhanced star formation with respect to
isolated galaxies with the same luminosity and redshift distribution. Our
results suggest that the physical processes at work during tidal interactions
can overcome the effects of environment, expect in dense regions.
