Associations give principals shared leverage over trustees. [causal]
Other principals join membership associations and support public-interest group watchdogs or collectivize to share the costs and enjoy the economies of scale involved in protecting their trust. Collectivization also serves as an embeddedness strategy, since these associations are more likely than their constituents to have dense, repetitive, or ongoing ties to trustees that enable them to select, monitor, and control those who act on their behalf (Galanter 1974).
XREF: Relates to principal-agent theory and reputational trusteeship literature, connecting to institutional trust and embeddedness economics.
Shapiro, Susan P., The Social Control of Imper…, loc. 98