IFLS is a longitudinal, broad-purposed household survey that was designed to collect information about individuals, households and communities. The sample is representative of about 83% of the Indonesian population and contains individuals living in 13 of the 27 provinces in the country. The first wave of the IFLS was conducted in 1993-1994 with 7,224 households and 33,026 household members. Detailed individual-level data were collected from over 22,000 individuals. The IFLS is a comprehensive multipurpose survey that asks both current and retrospective questions at the household and individual levels, with at least four waves of follow-up surveys by interviewing the baseline individuals and their descendants.