PROJECT ABSTRACT Community redevelopment policies that aim to move families from communities of concentrated poverty into mixed-income communities have the potential to positively transform the lives of those families, reducing barriers and providing opportunities for sustained upward social mobility and better health outcomes. However, transitions into mixed-income communities are not without challenges, including the potential for highlighting economic inequality and increasing exposure to discrimination and social exclusion, especially among youth of color (e.g., Chaskin et al., 2013; Odgers & Adler, 2018) and older youth. This Diversity Supplement presents a unique opportunity to examine whether improvements in academic or health outcomes following a transition into high quality, mixed-income housing are mediated by shifts in social mobility beliefs which then help youth better take advantage of new social connections and opportunities in their mixed-income community. Aim 1: Use mixed methods to track whether beliefs about social mobility shift in response to changes in housing and community contexts, and whether these shifts vary by age. Aim 2: Examine whether changing housing and community contexts affect academic and health outcomes by shifting beliefs about social mobility. Aim 3: Assess whether the consequences of social mobility beliefs vary based on racial-ethnic identity. Clarifying the mechanisms that affect why and for whom benefits accrue is essential for creating better community redevelopment policies and improving opportunities for economic mobility.