[Vaslo]

They have spent a lot of money to research the fact that people are less productive when hungover. I guess even known things are targets for scarce research dollars.

[Mirioron]

It's also important to figure out the magnitude of the effect.

[diffeomorphism]

How much less? How does it depend on exactly how much they drank (linear, quadratic)? How much does it differ from person to person? ...?

It is obvious that it has some impact, but not at all obvious how this works in detail.