Change in time and risk preference and effects of extrinsic and intrinsic motivation on their change

2010年，离散选择实验表明，高度依赖性吸烟者的吸烟继续率下降，而中低依赖性吸烟者的吸烟继续率上升。对戒烟者进行队列分析，戒烟成功者的时间偏好率和内在动机指数没有变化，而戒烟失败者的内在动机指数下降，时间偏好率上升。

In 2010, the discrete choice experiment indicated that the smoking continuation rate dropped for highly dependent smokers and increased for low and middle dependent smokers. A cohort analysis for smokers in quitting, successors have no change in time preference rate and intrinsic motivation index, though who failed to quit show decrease in intrinsic motivation index and increase in time preference rate.