[EM] Re: Utilities?

[Stephane Rouillon]

Maybe I am wrong, the two diagram sets I saw are not "equivalent" in my
eye.
Can someone provide a better term than "equivalent"...
It's OK for the right ones, but not for the left ones.
(A=C) > B  and  (A=C) > D  is "equivalent" to (A=C) > (B=D)
A > B and C > D is not "equivalent" to A > B,  A > D, C > B and C > D
because first case allows A>B>C>D and second does not.
Did I miss something?
The last classification seems to miss the disjoint cases of undecidness,

maybe it should be a third class.

Steph

Steve Eppley a écrit :

> The> difference shows up easily in the Hasse diagrams > of the
> corresponding preference quasi-orders:> >   undecidedness:
> equivalence:>   A   C         A=C>   |   |         / \>   |   |
> /   \>   B   D       B     D>
>
>
>
>
>   So, to avoid confusing the issues when studying the difference
> between undecidedeness and equivalence on voter behavior, I think
> weshould prefer an example such as this:  undecidedness
> equivalence     A    C              A=C     |\  /|               |
> | \/ |               |     | /\ |               |     |/
> \|               |     B    D              B=D
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