Abstract
This research applies the notion of sustainability (Barney, 1991; Braa, Monteiro, & Sahay, 2004) to the mechanisms used by socially responsible investment(SRI) firms with respect to their stakeholders (investors and target firms). A contrast is developed between US and UK SRI firms. It is noted that screens, while maintaining a strong investor base, are less sustainable from the perspective of the firms targeted by SRI funds, whereas advocacy has stronger elements of sustainability with respect to the relations with corporations.