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It does not have to be addressed, but it provides a mechanism for resource constraints in one sector to reach into other sectors in ways that are not immediately apparent from their input/output tables.

If one sector runs into a hard upper limit to production, leading to scarcity-induced price inflation in that commodity, demand for all complementary commodities will decline. This has dramatic consequences, in that a fairly small number of resource constraints can seriously hamper a modern, highly interconnected economy. And this is not obvious from a purely supply-side picture.

- Jake

If you only spend 20 minutes of the rest of your life on economics, go spend them here.

by JakeS (JangoSierra 'at' gmail 'dot' com) on Tue Dec 15th, 2009 at 12:47:54 PM EST
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I don't disagree. I just think you might be asking too much of a humble PPF graph to try to make argument, thus resulting in confusion. I think it would be clearer to leave just the supply side picture to the PPF, which is what it was made for, and allow another graph to show the demand side effects, similar to the way macro econ students learn to use related but different IS-LM graphics regarding interest rates and aggregate demand.
by santiago on Tue Dec 15th, 2009 at 01:36:53 PM EST
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