Such measurements necessarily carry a high degree of uncertainty, but help provide important information:

There is much uncertainty concerning the depth and extent of the crisis.

At the same time, economic growth in the euro area continues to remain weak, with heightened uncertainty weighing on confidence and sentiment.

Finally, against a backdrop of elevated policy uncertainty, the forecast rests on the assumption that major policy missteps are avoided.

In the Governing Council’s assessment, the risks to the economic outlook are broadly balanced in an environment of uncertainty.

This is what we did on spiders to identify populations to protect for a conservation program in France, in spite of significant uncertainties in the predictions for several species.