As they have increased the availability of knowledge, these technologies have led to an interest in analysing telephone calls and the transmission of faxes and telexes between world cities. At best, this focus provides a partial analysis of international linkages and interactions because it concentrates on the transmission of routinized and uncomplicated information.
Links facilitate flows.
In exchanging standardized information, personal contacts can be replaced by telecommunications. Accessibility is a key concept because it determines each emerging world city's potential as a generator of goods, people, and information. Also, it reflects the decreasing role of the friction of distance in telecommunications and its persistence in movements of goods and people. Internal network structure within a world city is an important determinant of the regional division of labour. With the highest accessibility, the central node is the prime location for workers handling both structurally complex and uncomplicated information.