Campbell says Afghan and world leaders must look at the socio-economic factors fueling drug use.

VOA: standard.2010.06.23

So you--it doesn't--this theory doesn't say a whole lot about what the term structure will look like but it suggests that it's determined by the interplay of lots of economic factors.

这个理论没有详细说明期限结构,期限结构是什么样子的,但它指出了这是由,经济因素间的相互作用决定的

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