Collaboration network puzzle

[Gohar F. Khan]

Dear Colleagues:

Please help me solve the following puzzle.

Using the Web of Science publication data, I have constructed two networks,
1) author level collaboration network, and 2) institutional level
collaboration networks. The publications are in a particular research
field.

The problem is that the author network is composed of several small
disconnected clusters with largest component consisting of only 43 nodes or
authors. However, the institutional level collaboration network is well
connected with 326 institutions in a single component.

I just wonder what could explain these differences? Normally, when I
construct such networks, the institutional network is sparse as compared to
the authors network, as all the publications (or nodes) from a particular
institute are merged into a single node when creating an institutional
level collaboration network. But, here it is the opposite.

What could cause this to happen? Any ideas?


Regards,

-- 

Gohar Feroz Khan, PhD
Assistant Professor
Korea University of Technology & Education (KoreaTECH)
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