Between 1983 and 1993 the authors published a series of articles and a book
promulgating and explicating "Critical Mass Theory," a theory of public go
ods provision in groups. In this article we seek to trace the growth, chang
e, or decline of the theory, primarily through an analysis of all journal c
itations of the theory. We find that the majority of citations are essentia
lly gratuitous or pick a single point from the theory, which may or may not
be central to the theory. However, we identify four lines of theorizing th
at creatively use substantial parts of Critical Mass Theory in their own de
velopment: (1) theories relevant to issues in communication studies such as
interaction media and shared databases; (2) Macy's work on adaptive learni
ng models; (3) Heckathorn's models of sanctioning systems; and (4) theories
that are centrally concerned with issues of influence in collective goods
processes. A Jew additional, less-developed lines of work are also discusse
d. None of this work identifies itself as being itself "Critical Mass Theor
y, " but many of the innovations and assertions of the theory are important
bases for its development.