The survey provides a wide range of health utilization and insurance coverage information. In particular, respondents are asked whether or not they have been admitted as an inpatient in the last 12 months, which will be our measure of utilization.11 The survey also provides information on insurance status, including whether an individual was part of the MWS, SSS/CSMBS, or UNINS in 2001, and whether an individual was part of SSS/CSMBS or 30 Baht in 2003–2005.