Why?
The authors thoroughly outline their approach (and its limitations) based on available literature.
What specific criticism do you have?
The authors thoroughly outline their approach (and its limitations) based on available literature.
What specific criticism do you have?
When measuring economic impact, they could very well be equivalent. A dollar lost when someone can't work due to a broken bone is economically equivalent to a dollar lost when someone bedridden with a virus.
Best case, your comment is an oversimplification of what the authors spent a dozen or so pages explaining. The limitations they describe perhaps encompass some of your concern. They also describe alternative calculations.