Fig. 1. Range in forms of bridging organizations based on stakeholder diversity and level of formalization. Stakeholder diversity refers to the heterogeneity of constituents of a bridging organization, as defined by Brown (1991). This categorization is rough and the placement of each organization in the two-dimensional space should be seen as approximate. More work is needed to develop an exhaustive typology of bridging organizations and to fully conceptualize axes along which they vary.