> The question is: how could one find evidence that justifies or refutes the idea that the scale of firms does in fact fit zipf and that measure is being obscur

> The question is: how could one find evidence that justifies or refutes the idea that the scale of firms does in fact fit zipf and that measure is being obscured at the tail? Well, I think to find that evidence, you would have to take a measurement of the amount of shadow banking from one of these firms. Objectively, you can't do that, since there is no agreed upon definition of what the term shadow banking means.