The middle class by a definition consist of an upper middle class, by professionals distinguished by exceptionally high educational attainment as well as high economic security and a lower middle class consisting in semi-professionals; while the groups overlap, differencces those at the center of both of academic is not considerable.
The middle class by one definition consists of an upper middle class, made up of professionals distinguished by exceptionally high educational attainment as well as high economic security; and a lower middle class, consisting of semi-professionals. While the groups overlap, differences between those at the center of both groups are considerable.