Local and regional weather patterns are more difficult to predict, as anyone who has relied on a five-day weather forecast can understand.

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Philip Shaw, chief economist at the investment bank Investec, said the Bank of England's monetary policy decisions were getting more difficult to predict.

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The rating agency downgraded French debt one notch to AA1, saying its resilience to future euro area shocks is becoming more difficult to predict.

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The attitudes of central European countries are more difficult to predict.

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But there is far more that, looking back, will have been very difficult to predict with much accuracy.

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Venture capital fund managers have been more in the spotlight as they invest in successful start-ups in the difficult to predict internet market.

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It is difficult to predict what will prevail, but it is not an organizationally driven thing any more.

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