'dead body economics' - but unlike the effects of ash at least one can say the financial consequences of a loss are a known factor.
You can already see the raw data they are using as the basis for some forecast, decision or judgment is being tweaked. Collecting reliable data will take a long time and during this process of course you get a lot of garbage in, garbage out. Translated this comes out as fly above, fly below, don't fly at all. Getting this forecast accurate will take years. In the meantime let each company make their own decision rather than a third party making a blanket ban.