Population ecology and niche seeking in the development of gay and lesbian rights groups

This paper explores the formation of groups within the framework of the population ecology literature. Specifically, I argue that newly formed groups’ target membership bases and policy agendas will become more focused as the density of interest groups in a population increases, though groups will not necessarily continue this focused trend once the density of the population has reached its upper limits. To test this theory, I utilize Nownes’ [Nownes, A. J. (2004). The population ecology of interest group formation: Mobilizing for gay and lesbian rights in the United States, 1950–1998. British Journal of Political Science, 34, 49–67] dataset on the population ecology of gay and lesbian rights groups and a typology of groups that Bosso [Bosso, C. J. (2005). Environment, Inc.: From Grassroots to Beltway. Lawrence: University Press of Kansas] used in explaining the focus of environmental rights groups. I find that as the population of gay and lesbian groups became more dense, the groups that formed tended to narrow down their potential membership populations. However, the results were different for a newly formed group's policy agenda. While niche seeking occurred during the rapid growth of groups in the 1970s and the early 1980s, groups that formed after growth leveled off in the mid-1980s balanced their agendas between being too broad and too narrow. This important finding indicates that niche seeking does not always occur in very dense interest populations.