Disclaimer. Don't rely on these old notes in lieu of reading the literature, but they can jog your memory. As a grad student long ago, my peers and I collaborated to write and exchange summaries of political science research. I posted them to a wiki-style website. "Wikisum" is now dead but archived here. I cannot vouch for these notes' accuracy, nor can I even say who wrote them. If you have more recent summaries to add to this collection, send them my way I guess. Sorry for the ads; they cover the costs of keeping this online.
Raustiala. 1997. States, NGOs, and international enviromental institutions. International Studies Quarterly 41 (December): 719-740.
NGOs have increasingly taken on roles previously limited only to states. Raustiala seeks to explain why NGOs are allowed to participate and/or carry out state functions. He identifies two key variables: state incentives and NGO capabilities. In his words, "States have incorporated NGOs because their participation enhances the ability, both in technocratic and political terms, of states to regulate through the treaty process. The terms of that incorporation reflect the resources, skills, and domestic influence of NGOs."
Research on similar subjects