I believe this is correct, but possibly for the wrong reason.
The reason you give sounds right — for certain concave views, you really care that at least some people are bringing about or acting on the things you care about. One point, though, is that (as we discuss in the previous post) reasonable views which are concave in the good direction are going to be more sensitive (higher magnitude or less concave) in the negative direction. If you have such a view, you might also think that there are particular ways to bring about a lot of disvalue, so the expected quantity of bads could scale similarly to goods with the number of actors.
Another possibility is that you don’t need to have a concave view to value increasing the number of actors trading with one another. If there are very few actors, the amount by which a given actor can multiply the value they can achieve by their own (even linear) lights, compared to the no-trade case, may be lower, because they have more opporunities for trade. But I haven’t thought this through and it could be wrong.
The choice of two dimensions is unmotivated
Yep, totally arbitrary choice to suit the diagram. I’ve made a note to clarify that! Agree it generalises, and indeed people diverge more and more quickly on average in higher dimensions.
Thanks Oscar!
The reason you give sounds right — for certain concave views, you really care that at least some people are bringing about or acting on the things you care about. One point, though, is that (as we discuss in the previous post) reasonable views which are concave in the good direction are going to be more sensitive (higher magnitude or less concave) in the negative direction. If you have such a view, you might also think that there are particular ways to bring about a lot of disvalue, so the expected quantity of bads could scale similarly to goods with the number of actors.
Another possibility is that you don’t need to have a concave view to value increasing the number of actors trading with one another. If there are very few actors, the amount by which a given actor can multiply the value they can achieve by their own (even linear) lights, compared to the no-trade case, may be lower, because they have more opporunities for trade. But I haven’t thought this through and it could be wrong.
Yep, totally arbitrary choice to suit the diagram. I’ve made a note to clarify that! Agree it generalises, and indeed people diverge more and more quickly on average in higher dimensions.