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There's a new 3Blue1Brown video hinting in the same direction. https://www.youtube.com/watch?v=GlYgs6v2YfU

This. The full set of constraints (monopoly, durability, constant MC, timelessness) can hardly ever be fulfilled. So it is not falsifiable by empirical data. But nobody has questio…

I disagree. Imho, the problem of this simple model is to find a situation in reality which is close enough to fulfill the constraints. E.g., it is implied that consumers can postpo…

It is a very unrealistic and simple model. The question remains, however, what is meant by the > quite general conditions [under which] the logic goes through. This seems pretty co…

Kind of. The whole setup is pretty improbable. There is durable good which means that consumers will only buy once (pharma doesn't seem to fit here). And there is the monopolist. S…

This. With this much income you should qualify for a Blue Card. The 27 months start when you are eligible, not when you are actually holding the Blue Card. A friend of mine (w/ Blu…

Fascinating animation. But there is one thing I don't understand. What is the purpose of the left axle gear (green)? It is not fixed to the axle because it rotates in the same dire…

I think it is for this reason that Switzerland has a fixed budget for their railway construction. And it seems to pay off, Swiss railway is exceptional.

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Really nice clock. One nitpick on the day/night line: This is strongly dependent on the latitude, i.e. it kind of collides with your notion of the world clock. Maybe you boldface t…