Joint probability distributions of overdensity fields for dark halos and galaxies with dark matter overdensity smoothed over ﹩R_{s}=12\,h^{-1}﹩ Mpc (upper panels) and ﹩R_{s}=4\,h^{-1}﹩ Mpc (lower panels) at redshifts ﹩z=0﹩, 1, and 2. Solid lines: Conditional mean ﹩\overline{\delta }_{i}( \delta _{m}) ﹩ for each object. Dashed lines: Theoretical prediction of conditional mean by TS.