But each time it chooses small hikes, it encourages projects, investments and schemes dependent on the Fed undershooting.

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That in turn will not only increase appraisals but produce momentum that will lead to less undershooting by nervous appraisers.

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By undershooting inflation a little now, it reduces the risk of undershooting by much more at some time in the future.

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And it is not just public investment that is undershooting this year.

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The Bank of England's inflation target, set by the government is currently 2.5%: undershooting the target is no less undesirable than overshooting it.

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And the idea that we were going to build a physical campus to reach a tiny fraction of those kids was, to me, tragically undershooting our potential.

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With an inflation-rate target, any undershooting of the goal is treated as over and done with, but with a price-level target any undershooting must be made up for later by a period of overshooting, so the inflation rate aimed for can vary from year to year.

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