Completeness of the χ² color similarity statistic (see eq. [2]) as a function of redshift for a quasar pair survey that observes all quasar pair candidates with ﹩\chi ^{2}< 20﹩. The dispersion in the color‐redshift relation of quasars (Richards et al. 2001a) gives rise to a broad distribution of χ² for pairs of quasars at the same redshift (see Fig. 1). As the amount of color dispersion varies with redshift, so does the fraction of quasar pairs recovered for ﹩\chi ^{2}< 20﹩. Restricting the observations of pair candidates to those with ﹩\chi ^{2}< 20﹩ results in ~35% completeness in the redshift range ﹩0.70< z< 3.0﹩.