3. The global control functions of world cities are directly
reflected in the structure and dynamics of their production sectors
and employment.
The driving force of world city growth is found in a small number of
rapidly expanding sectors. Major importance attaches to corporate
headquarters (Cohen 1981 ; United Nations 1982), international
finance (Kindleberger 1974; Jao 1979; Meyer 1984), global transport
and communications (Port Authority of New York and New Jersey
1982; Jacobson 1984; and the article by Rimmer in this issue); and
high level business services, such as advertising, accounting,
insurance and legal (Noyelle & Stanback 1984).’ An important
ancillary function of world cities is ideological penetration and
control. New York and Los Angeles, London and Paris, and to a
lesser degree Tokyo, are centres for the production and
dissemination of information, news, entertainment and other
cultural artifacts.