Thesis advisor: Sara Moorman / This research examines social support transfers, social support networks and psychological well-being among older adults (aged 60+) in five countries in Latin America: Argentina, Brazil, Chile, Mexico and Uruguay. It is based on the following three research questions: 1) How is network structure associated with the receipt of financial and instrumental support among older adults in Latin America?; 2) What motivates the provision of financial or instrumental support to older adults in Latin America?; and 3) Do support transfers from kin and non-kin differently affect psychological well-being among older adults in Latin America? These questions are answered using data from the Survey on Health, Well-Being, and Aging in Latin America and the Caribbean (SABE), which includes information on over 7,000 older adults living in private homes in Buenos Aires (Argentina), Sao Paulo (Brazil), Santiago (Chile), Mexico City (Mexico) or Montevideo (Uruguay). Additionally, the study examines data on over 50,000 members of older adults' household and family networks. Findings confirm the importance of network structure for the receipt of both financial and instrumental support among older adults in Latin America. They also suggest a dynamic perspective of support provision throughout the region, where members of older adult's networks jointly navigate a mix of motivating factors to provide support to older adults in need. Lastly, results highlight the importance of kin support for the psychological well-being of older adults throughout the region. The findings presented in this dissertation provide an important first step in understanding elder support and psychological well-being in Latin America, and offer a strong foundation for future assessments throughout the region. / Thesis (PhD) — Boston College, 2014. / Submitted to: Boston College. Graduate School of Arts and Sciences. / Discipline: Sociology.