¡ Journals
in a field can be divided into three parts,
each with about one-third of all articles:
¡
l 1) a
core of a few journals,
l 2) a
second zone, with more journals, and
l 3) a
third zone, with the bulk of journals.
¡
¡The number of journals is 1:n:n2
¡
¡To think about: Why is this true?