Lin Freeman tells me that Anthonisse's 1971 paper doesn't actually mention edge betweenness. Apparently, the gradap people did the extension themselves. As the gradap manual puts it "Both [freeman's and anthonisse's betweenness models] differ however in their normalization...Moreover, Anthonisse's model provides the possibility of computing the rush for lines. The rush then gives the proportion of flow that passes [through] a line."
 
Steve.
 
Steve Borgatti, PhD Director
Organization Studies Department
Boston College
Chestnut Hill, MA 02467
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