WOULD YOU RATHER BE ILL NOW, OR LATER?
利用提前时间和滞后时间的时间权衡法数据，研究发现人们更愿意未来生病而非现在，且健康状态持续时间越长，每期贴现率越大。
The time tradeoff (TTO) method is frequently used to calculate the quality adjustment of the quality adjusted life year and is therefore an important element in the calculation of the benefits of medical interventions. New specifications of TTO, known as 'lead time' TTO and 'lag time' TTO, have been developed to overcome methodological issues of the 'classic' TTO. In the lead time TTO, ill-health is explicitly placed in the future, after a period of good health, whereas in lag time TTO, a health state starts immediately and is followed by a 'lag time' of good health. In this study, we take advantage of these timing properties of lead and lag time TTO. In particular, we use data from a previous study that employed lead and lag time TTO to estimate their implied discounting parameters. We show that individuals prefer being ill later, rather than now, with larger per-period discount rates for longer durations of the health states.