But given the uncertainties, those with a low appetite for risk might stay away from BofA for now.

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Given the uncertainties of the calculations, such figures can hardly be a blueprint for radically reordering spending priorities.

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Any positive impact Windows 8 would have is going to be muted at best for a while given the uncertainties facing the global economy, including the fiscal cliff, Europe, and others, Whitmore noted.

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The range of estimates is very wide, as you would expect given the uncertainties, but there is a weak consensus among researchers that the Kyoto proposals (especially in the absence of a trading regime and other cost-reducing arrangements) may have been a bit too stringent.

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This would be particularly true given the verification uncertainties with which such a ban is fraught.

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Given all the uncertainties, having some tax diversification might make as much sense as it does when investing.

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Concerns about President Suharto's health and other political uncertainties have given investors the jitters in Indonesia.

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However, for investors in Europe and the US, looking beyond next year is still a little difficult, especially given political uncertainties in Egypt, Tunisia and Libya.

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"Given that Scotland would be applying to join as a new member state, there are enormous uncertainties about the terms of such membership, over issues such as currency, rebates, opt-outs and borders, " said the source.

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