Research Question Crowdsourcing allows companies to harness the competencies and productive energy of consumers whose collective work can produce something of greater value than the firm can produce alone. For this research, we worked with one such company¾a leading producer of digitized nautical maps, whose consumers are empowered, and indeed encouraged, to edit and add features to digitized maps of waterways they navigate with the company's app. These consumer workers are the context of our current study as we aim to contribute to the literature by investigating the psychological dynamics related to consumption in crowdsourcing platforms. We draw on research from both consumer behavior and organizational studies, blending research on crowdsourcing, consumer empowerment, theories of consumer work and work in organizations, psychological ownership, and citizenship behavior. Psychological ownership is the sense of possession one holds for an object, entity or idea irrespective of whether there is legal ownership (Pierce, Kostova and Dirks 2001), while citizenship behaviors are non-prescribed actions that contribute to the wellbeing and growth of an organization or community (Organ 1988). Specifically, we ask the following: what is the role of psychological ownership in the relationship between consumer work and citizenship behavior? Method and Data The data for our study come from an online survey that was posted on the official Facebook and Twitter page for the company's customers to participate in exchange for entry into a raffle for four Amazon gift cards. One hundred and sixty-two customers (94.9% male) participated in the study. We measured consumer work (empowerment) by differentiating between contributors and non-contributors among the boating app users. For this participants answered the question of whether they had ever contributed to the community edits by inserting an object, commenting, rating, editing, or deleting. We measured psychological ownership using seven items such as "I sense that this map is our map" (α = .86; modified from Fuchs et al. 2010; see also Van Dyne and Pierce 2004). We measured consumers' citizenship behavior using eight items such as "I pass along information to other [company name] users" (α = .88; modified from Bachrach, Bendoly, and Podsakoff 2001; Lee and Allen 2002; Podsakoff, Ahearne, and MacKenzie 1997). We predicted that psychological ownership would mediate the positive effect of consumer work (empowerment) on consumer citizenship behavior. The significance of this effect was tested through the bootstrapping method, using Hayes and Preacher's (2013) MEDIATION macro. Summary of Findings Analysis revealed that although the relationship between consumer work and consumer citizenship behavior was positive, the indirect effect of consumer work on citizenship behavior through psychological ownership was not significant. This unexpected result contradicted the previously depicted relationship between consumer empowerment and psychological ownership (e.g., Fuchs et al. 2010). In order to resolve this contradiction, we focused on identifying a possible boundary condition that might have created an unaccounted aggregation issue. Drawing on previous literature that suggests empowered consumers "experience the feeling of 'having an impact'" (Fuchs et al. 2010, p.67), we turned to another question we had in the survey for managerial purposes: "How would you rate the amount of your contribution to the community edits in comparison to other [company name] users?" We categorized participants who reported lower contribution as the low impact group, and ran a posteriori test on their differences finding significantly lower levels of psychological ownership in the low impact group (M1 = 3.61 vs. M2 = 4.59; F(1, 33) = 6.22, p < .05). Thus, in order to overcome this aggregation issue, we eliminated the low impact group and ran a posteriori mediation analysis, which revealed a significant indirect effect of empowerment on consumer citizenship behavior through psychological ownership (95% CI=.02 to .63). Key Contributions Our findings suggest that consumer work increases consumer citizenship behavior, and this positive relationship can be partially explained by the degree of psychological ownership that the consumer feels toward the crowdsourced product. However, this explanation does not hold for consumers who perceive their contribution as being less than that of others. In other words, empowered consumers feel more psychological ownership of the crowdsourced product than non-empowered consumers only when they believe they have put in the same or a higher amount of work into the product as compared with other consumers on the crowdsourcing platform. Our study bridges research on crowdsourcing and organizational behavior in a way that emphasizes the role of engaging in consumer work on consumer responses toward the crowdsourced product and the crowdsourcing environment. It also extends previous consumer outcomes related to empowerment and psychological ownership to include consumer citizenship behavior toward the crowdsourcing environment. Finally, the paper introduces relative work amount as a potential boundary condition for psychological consequences of engaging in consumer work in crowdsourcing platforms where consumers are empowered to have an impact on value creation. Accordingly, marketers should apply marketing strategies that signal to the importance of each user's contributions. [ABSTRACT FROM AUTHOR]