Experimental design
DISEASE, CORONAVIRUS DISEASE 2019
An experimental design method from a previous study by Attema et al.For each iteration, a choice-based elicitation procedure was performed to obtain the subjects’ time preferences. After subjects had chosen their preferred option, the next iteration was altered to make the chosen option less attractive and the non-chosen option more attractive. The indifference values were determined after the experiment was completed. Detailed information on eliciting indifference values is provided in the data analysis section.In terms of health, the subjects were required to imagine that they had suffered from either COVID-19 or an air pollution situation. The interviewer informed the subjects that new health technology such as a vaccine or screening program was available and effective for disease treatment, resulting in the subjects’ full health state. The subjects were then asked to choose the most preferable period based on changes in their health condition (Fig. Example of questions about health and money. COVID-19, Coronavirus disease 2019.