Second, segregation leads to later discrimination in opportunities to use educational accomplishments to participate in the world of work, both because of divides in networks of relationships built up in the school community and the extension of these to families and because of differentiation in symbolic recognition and prestige gaps depending on where a person was educated. Residential segregation means that the different socioeconomic groups in a city or metropolis live separately, with little or no sharing of residential space. At the extreme, each residential space within a city23 presents complete socioeconomic homogeneity and is completely differentiated from the spaces where the other socioeconomic groups live.