I mean it's real for taxation too, it's just nobody wants to ever accept they might be on the side of the Laffer curve that implies taxes should go up.

Sorry, I meant the idea that we're on the right side is more real for fishing than taxation.

Everybody disagrees about which side they're on. It's incredibly difficult to know, because there's no way to run experiments.

I think your pessimism on the ability to find causation in econometrics is unfounded. There is good evidence we are on the left side of the laffer curve, although I’m on my phone right now.

Sufficiently sophisticated modeling could do the trick.

No matter how sophisticated the modelling, how would you know whether it's accurate? A model can be highly sophisticated, yet quite wrong.

Is your position just skepticism of models generally?

Can I define the initial variables or will you apply your own values?