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Node connection strength in AAA tree.
Each node in AAA tree can be characterized by its mean distance from every other node. Below is a histogram of mean distances for every node in the tree. The final bin includes nodes that are not connected to the main tree. Note also that only individuals whose primary affiliation is this tree are included. Nodes cross-listed from other academic trees are included on their primary tree.

Mean inter-node distance
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Mean distance



20 most tightly coupled nodes.
Below are the AAA tree nodes with shortest mean distance.

Rank Mean dist Name Institution Area Date
1 248.81 Arnold Barban (Info) The University of Alabama 2008-03-19
2 364.15 Charles H. Sandage (Info) University of Illinois, Urbana-Champaign 2008-03-20
3 398.28 Wei-Na Lee (Info) University of Texas at Austin 2008-03-20
4 431.04 Eric Haley (Info) The University of Tennessee 2008-04-01
5 437.43 Leonard N. Reid (Info) University of Georgia, Athens 2008-03-19
6 444.46 Dean M. Krugman (Info) University of Georgia, Athens 2008-03-20
7 447.83 Donald Jugenheimer (Info) Texas Tech University 2008-03-19
8 464.17 Sandra E. Moriarty (Info) University of Colorado, Boulder 2008-03-21
9 465.11 Jef I. Richards (Info) University of Texas law, ethics 2008-03-21
10 470.27 Ivan Preston (Info) University of Wisconsin, Madison 2008-03-19
11 473.42 Kevin Keenan (Info) American University in Cairo 2008-03-20
12 495.38 Jisu Huh (Info) University of Minnesota, Twin Cities 2008-03-03
13 498.57 Karen W. King (Info) University of Georgia, Athens 2008-03-20
14 516.22 Chunsik Lee (Info) University of North Florida 2008-03-21
15 560.09 Donald Parente (Info) Middle Tennessee State 2008-03-21
16 563.51 Hyojin Kim (Info) University of Florida, Gainesville 2008-03-21
17 573.04 Shelly L. Rodgers (Info) University of Missouri-Columbia 2008-03-21
18 576.22 Xiaoli Nan (Info) University of Wisconsin, Madison 2008-03-21
19 581.21 Glen T. Cameron (Info) University of Missouri-Columbia 2008-03-20
20 594.03 Brittany R. Duff (Info) University of Illinois, Urbana-Champaign attention, emotion, consumer behavior 2008-03-21


Distribution of individual connectivity.
Another way to look at the AAA tree graph is to plot a histogram of researchers (nodes) based according to the number of immediate connections (edges) they have to other researchers. The final bin includes nodes with 16 or more connections. The actual distribution has a very long tail, with a maximum of 31 connections. Thanks to Adam Snyder for suggesting this analysis!

Edge vs node distribution
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16+
Number of connections
 Node count