This dataset shows the friendship among high school boys as assessed by the question: "What fellows here in school do you go around with most often?". The question was posed twice, with one year in between (1957 and 1958) and shows the evolution in friendship between the two timepoints.
The graph is stored as an unnamed edgelist with a year attribute.
The boy answering the question
The boy being the answer to the question
The year the friendship was reported
Coleman, J. S. Introduction to Mathematical Sociology. New York: Free Press, pp.450-451.