Curt Siffert wrote:
[...] In other words, some vote theorists believe Arrow's theorem improperly asserts that passing the IIAC is a requirement to be considered a satisfactory voting method. [...]
I can't speak for the theorists, but that's not how I read Arrow's theorum. For one thing, he proved that IIA is impossible given the other criteria listed.
If I had time, I'd read through the monograph again with particular attention to whether it appeared that Arrow was personally advocating any of the criteria, or simply probing the relationship between criteria that had been commonly thought of as important or even mandantory.
For example, saying "criterion x could reasonably be considered important" is not the same thing as asserting "criterion x is important".
Just a thought. Bart
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