Overdensity-redshift (upper panels) and mass-redshift (lower panels) distributions of the sample of red galaxies (left columns) and ETGs (right columns). In the overdensity-redshift distribution, the galaxies residing in the lowest overdensity quartile are highlighted in green, and in red the ones in the highest. In the mass-redshift distributions, we indicate by black dotted vertical lines the redshift division of the sample, by black horizontal lines the lower mass limit adopted in each redshift bin, and by blue horizontal lines the division into tertiles for each bin. The curve joining the open circles represents the mass completeness of the sample.