I had planned to post this yesterday, when I was taken by surprise by the most severe supply chain and transportation disruption ever to hit Norway and much of Northern Europe: Volcanic ash from Iceland grounds all Norwegian air traffic, and it’s not over yet. Today appears to become another day with no air traffic in my neck of the woods and the social impact is widely felt, to say the least. And today’s post is by no means unrelated to air traffic. My latest favorite author, Terje Aven from the University in Stavanger, Norway, takes risk research to new heights in his most recent article from 2010. In How to define, understand and describe risk he contends that the uncertainty surrounding risk assessments is perhaps more important than the risk value itself.

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