Survey Methodology: http://www.gallup.com/poll/105226/world-poll-methodology.aspx
Data access seems to be provided by Gallup Analytics (not clear if it allows access to the respondent-level data, though).
- Deaton (2008), who investigates the relationship between per capita income and subjective well-being across the world, by using the 2006 poll.
- Clausen et al. (2011), who find a negative correlation between experiencing corruption and having confidence in public institutions.
- Steptoe, Deaton, and Stone (2015), who investigate the relationship between age and subjective well-being across the world.