Coexisting Multiple Networks mediating Multi-layered Coalition Structure

In this paper, we focus upon a possibility that coalitions with overlapping or multi-layered structure forms, by means of examples from coalition formation game. In particular, utilizing framework of network structure adopted from Page, Wooders, and Kamat (1995), we examine possible effects of various patterns of cost of forming overlapping networks. In some examples, costs deter formation of smaller size coalition in the lower layer rather than large coalitions.