Abstract: Complex network provides a new tool for studying organizational structure of an open source software community. With the C# of the codeplex community in an open source community as a case, a project - producer weighted bipartite network and weighted cooperative network model are developed in this paper. Then, a null model is presented and analysis of the index for these two network models is carried out. It is found that weighted network is better to reflect the open source software community characteristics of organizational structure. Finally, economic significance is explained and discussed for these network indicators.

Key words: open source software community, weighted network, mass production
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