Supplementary table I: General classification of the academic content at the under graduate and graduate levels (broad fields of education as well as narrow fields) Broad fields of education Narrow fields of education Humanities and arts Languages; literature and librarianship; history and philosophy; religion; music, dance and drama; visual art and crafts Teacher training and pedagogy Pre-school teacher training; general teacher training; specific subject and vocational teacher training; pedagogy; supplementary education for teaches Social sciences and law Political science; sociology; social geography; economics; media and information; psychology; law; social anthropology Business and administration Business and administration; wholesale and retail sales and marketing; secretarial and office skills; hotel, travel and tourism Natural science, vocational and technical subjects Biology; physics and chemistry; mathematics and statistics; information and computer technology; electricity, electronics, mechanics and machinery; earth sciences; building and construction; manufacturing and extraction Health, welfare and sport Nursing and caring; social services; medicine; dental health; therapy; pharmacy; veterinary medicine; sport and physical education Primary industries Fisheries and aquaculture; agriculture; horticulture; forestry Transport and communications, safety and security and other services Transport and communications; safety and security; other services Source: Statistics Norway (http://www.ssb.no/a/english/publikasjoner/pdf/nos_c751_en/nos_c751_en.pdf)