[EM] Proportional Representation beyond STV?

Adam Tarr atarr at purdue.edu
Mon Jul 7 12:46:03 PDT 2003

Good question Rob.  There have been several attempts on this list to extend 
Condorcet to multi-winner, but none have been really satisfying.

On the other hand, Forest Simmons has found an excellent way to extend 
approval voting to multi-winner.  Proportional approval voting (PAV) is, in 
my opinion, better than STV, and not just because it reduces to approval 
voting in the single-winner case.

Here's the initial thread about it:


and here's some commentary I had before:



At 03:10 PM 7/7/2003 -0400, Rob Speer wrote:

>Does anyone know of any theoretically nicer PR methods than STV? Usually
>when I see proportional methods being discussed, the discussion stops at
>Now, I agree that STV is pretty nice (I live in Cambridge and I'm pretty
>happy with the system), but there is the fact that in the one-winner
>case it reduces to IRV, which I rather dislike.
>Although the multiple winners seem to avoid some of IRV's nastier cases,
>it seems that there could be a method with better properties, perhaps
>one that reduced to a Condorcet method.
>Of course I've heard "Condorcet Series" mentioned - just pick the top N
>winners in a Condorcet method - but of course that isn't proportional;
>it elects N centrist candidates.
>[Incidentally, I've had a heck of a time sending this message. I'm new
>to the list, and I tried to send to election-methods-list at egroups.com,
>which gave me a bounce telling me to send my message instead to...
>election-methods-list at egroups.com. Something is messed up on the Yahoo
>Rob Speer
>Election-methods mailing list - see http://electorama.com/em for list info

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