[EM] Two Round Methods
forest.simmons21 at gmail.com
Sat Sep 25 22:08:04 PDT 2021
If no majority approval in either round, then elect by random approval
ballot from one or both rounds.
[Draw as many as necessary to narrow down to one candidate]
Kevin wrote ...
I see a need for non-eliminative two-round methods. I like the idea
that the first round places
a "default winner" or "guy to beat" in the electorate's consciousness,
so that, possibly, voters
would consider offering more of their preferences in the second round.
A difficult thing is to make sure it is worthwhile to seriously
compete in the first round, and
also, relatedly, that the second round should not simply reverse the
outcome of the first round
based on small changes in participation rate.
Here's an idea based on two-round Approval. Let's call it NETRA.
1. If the first round winner ("FRW") has majority approval, he is elected. End.
2. Otherwise hold the second round with all the same candidates. If
this new winner has
majority approval *and* the FRW does *not* have majority approval,
then the new winner is
elected. Otherwise the FRW wins.
So in the second round the FRW is given a couple of perks. If he
raises his vote to a majority,
or if (again) no one can get a majority, he doesn't have to beat
anyone. He can prevail based
on his first victory.
This has two purposes: It should be desirable to be the FRW. And the
should increase the electorate's assessment of the FRW's odds, so that
hopefully the second
round serves to tell us whether there is a candidate preferred by the
voters to the FRW. (It
is an approval ballot in form, but what I'm actually after is the
FRW's pairwise contests.)
1. If candidates were to conclude that being the FRW is overall a bad
situation. I'm not
sure how likely this is, given that a first-round majority is an auto-win.
2. It's still quite possible that a majority opposing the FRW in the
second round would fail
to agree to get behind any single candidate. Then a lack of an
approval majority in the first
round would simply be repeated in the second, for no benefit. (There
is, I suppose, the
additional confirmation, for all to see, that there is no majority
willing to unite against the
FRW... It also confirms that the winner couldn't attract a majority.)
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