One more only if it is one of us. The number of partners and the stock market reaction to domestic and international alliance formation in EU telecom firms

In this paper, we analyze the interaction between two dimensions of strategic alliances whose real impact on the potential value of an alliance has not yet been highlighted: the number of partners and the direct competition among them. Building on the resource-based view, as well as on the relational view of alliances, we argue that increases in the number of partners are positively valued by the stock market when the alliance is formed by competing firms that belong to different countries. Multiparty alliances are thus positively valued when they allow a quick internationalization by affording access to resources owned by competing firms from different countries. An empirical test of stock market reaction to alliances announced by European telecom firms between 1986 and 2001 has confirmed our hypotheses.