While these categories aptly describe the divisions within education, they are not comparable to the hierarchical categories within other occupations, and thus make comparisons of levels of vertical segregation quite difficult.
Dok ove kateogrije zgodno opisuju podele unutar sistema obrazovanja, ne mogu se porediti prema hijerarhijskim kategorijama u okviru ostalih zanimanja, i time čine poređenje nivoa vertikalne segregacije prilično teškim.