By and large, though, they don't, which Mr Laibson takes to mean that they use a different rate for events far off than for those near to.

可是，他们大体上不会这么做。莱布森先生用这个例子说明，人们为遥远的事件利用的贴现率，不同于为较近的事件利用的贴现率。

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"Our logical brain can see the consequences of our actions, but our emotional brain has trouble imagining the future," explains Harvard professor David Laibson, an author of the study.

“大脑理智的一面可以看到我们行为的结果，但大脑情绪化的一面无法做到这点”，其中一位研究者，哈佛的大卫·莱布森解释道。

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David Laibson, an economist at Harvard University, believes that the problem is lack of self-control.

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StickK.com came about as a result of the theoretical work of Laibson and others on commitment contracts, Karlan said.

CNN: Putting a price on procrastination

More specifically, says Laibson, people perceive rewards and costs as having only half the weight tomorrow that they have today.

CNN: Putting a price on procrastination