“…We hypothesized that individual weed control on private lands is a collective action problem because, holding individual factors constant, collective factors would explain significant variation in individual landowner weed control behaviors. More specifically, for our application of the collective interest model (CIM) we drew independent variables from the extant qualitative weed control research and broader collective action literature, including the following: injunctive and descriptive normative beliefs (Nowak and Sigmund 2005, Yung and Belsky 2007, Marshall et al 2016, McKiernan 2017, the recognition that weed control is a crossboundary problem (Fiege 2005, Marshall 2009, Yung et al 2015, reciprocity (Kollock 1998, Ostrom 2000, Panchanathan and Boyd 2004, Marshall et al 2016, area-wide satisfaction with weed management (Finkel and Muller 1998, Reid et al 2009, Graham and Rogers 2017, sense of community (Graham and Rogers 2017), and group efficacy (Chong 1991, Finkel and Muller 1998, Epanchin-Niell et al 2010. Previous literature has established the relationship between individual factors and individual weed control behaviors.…”