This work has been supported in part by:
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NSF IGERT Grant No. 9972762 in CASOS |
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The Carnegie Mellon Center on Computational Analysis of Social and Organizational Systems (CASOS) |
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NSF. ITR/IM IIS-0081219 |
| I also received support from an NSF Dissertation Research Improvement grant from the NSF Sociology program, Grant No. 0201706. |
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