This study has two main objectives. The first objective is to compare the values of individual Human Capital Indices (HCIs) in different groups and different years. The second objective is to examine and support the components of the Human Capital Index that determine the preparation of the pre-retirement population in Thailand. This study uses secondary data from the National Statistical Office’s National Survey of Older Persons in Thailand from surveys conducted in 2011, 2014, and 2017. It also uses data such as the number of doctors per 1,000 ...