期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 108, 期 13, 页码 5199-5202出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1015564108
关键词
industrial organization; network dynamics
资金
- Divn Of Social and Economic Sciences
- Direct For Social, Behav & Economic Scie [1124073] Funding Source: National Science Foundation
Complex social networks have received increasing attention from researchers. Recent work has focused on mechanisms that produce scale-free networks. We theoretically and empirically characterize the buyer-supplier network of the US economy and find that purely scale-free models have trouble matching key attributes of the network. We construct an alternative model that incorporates realistic features of firms' buyer-supplier relationships and estimate the model's parameters using microdata on firms' self-reported customers. This alternative framework is better able to match the attributes of the actual economic network and aids in further understanding several important economic phenomena.
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