It says that the main effect on its forecast is to increase the range of possible outcomes.

ECONOMIST: The Bank of England yanks down its growth forecast

You can modify the interactive chart below to gauge the effect a change in forecast will have on our price estimate.

FORBES: MetLife Is Worth $39 On Asian Growth

You can gauge the effect of a change in forecast by modifying the charts above.

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And we actually do that prior to our mandatory evacuation, which, based on the current forecast, mandatory evacuations will go into effect tomorrow at 6 PM.

NPR: Texas' Coastal Regions Brace for Hurricane Rita

In effect, the IMF split the difference last week, with its estimate that fiscal tightening had caused Britain's national output to be 2.5% smaller than it would have been (though the Treasury would claim that some of that effect was incorporated in the original forecast).

BBC: UK GDP: A nasty surprise and a puzzle

My forecast is a growing crisis in Europe, a contagion effect in the European banking system, a resulting credit freeze, spreading to the rest of the world, and basically a rerun of many of the things that happened in 2008.

FORBES: Wall Street Reduces S&P 500 Target

Although the currency has appreciated since mid-March, renewed weakness is possible, and the effect of a collapse in the value of the rupiah (not our central forecast) would be to lower the spending power of most Indonesians.

ECONOMIST: Indonesia's robust economy continues to grow

Overall, net government borrowing is on course to be about a third lower as a share of GDP than when the coalition came in: it's forecast to be 6.9% of GDP in 2012-13 (excluding the temporary effect of transferring the Royal Mail pension scheme), compared with 10.1% of GDP in 2010-11.

BBC: An economic mid-term review