Suppose this example under simple approval + top 2 runoff: Sincere preferences:
8: A > B > C 7: B > A > C 6: C > B > A In the first round, they decided to approve only their first preference: 8: A 7: B 6: C C is eliminated. In the second round, the 6 C voters will support B, then B wins. To avoid this, the A party nominates a clone A*. Then, the first round is changed to: 8: A, A* 7: B 6: C Then A and A* are in the runoff with 8 approvals. I. e., App + t2r has the same clone-help property like borda. Under IAR, if A is the approval winner, the A* approval score is 4, and B still is in the runoff. Then IAR reduces the probability that a candidate wins because of strategic nomination. 2008/10/18 Raph Frank <[EMAIL PROTECTED]> > On Sun, Oct 19, 2008 at 3:12 AM, Diego Santos <[EMAIL PROTECTED]> > wrote: > > Hi Raph, > > > > 2008/10/18 Raph Frank <[EMAIL PROTECTED]> > >> What strategy is it designed to protect against? > > > > Improved Approval Runoff is a trying to fix Two-round runoff, to avoid > cases > > like 2002 French presidential election. You can approve your favourite > > candidate with low chances of winning, and other satisfactory > frontrunner. > > Why can't you do that in by just using approval + top 2 run off, why > the need to have the half vote reweighting? > -- ________________________________ Diego Renato dos Santos Mestrando em Ciência da Computação COPIN - UFCG
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