Methods
A computer-based experimental design was used, along with a choice-based elicitation procedure, to obtain time preferences for money and health. The experiment based on money-related questions was carried out in all subjects. For health-related questions, the subjects were divided into two subgroups, one to answer questions about COVID-19 and the other about air pollution caused by fine particulate matter. The data were collected from a large representative sample of the Chiang Mai Province population aged 25–50 years.