Conditional Approval: Difference between revisions
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'''Conditional Approval''' or '''CdlA''' is a method devised by [[Kevin Venzke]] which simulates voters adding approval to candidates only as needed over a number of rounds.
==Definition==
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CdlA is not [[monotone]], similar to other methods of this sort. Experimentally it is quite close to [[MinMax]](Winning Votes), and the situation with regard to burial strategies and deterrence is probably similar.
== Example ==
[[Category:Single-winner voting systems]]▼
{{Tenn_voting_example}}
Suppose that the voters place their first preference in the top slot and their second preference in the middle slot, leaving the bottom two preferences unvoted.
Initially, we count only the top-slot ratings, and Memphis has the most votes (42%) and is the first leader. In response to this, supporters of the other three cities all cast their middle-slot preferences, since they didn't give any rating to Memphis. This results in Chattanooga leading with 58%. Since the Memphis voters didn't rate Chattanooga, they cast their preference for Nashville. This brings Nashville's count up to 68%.
Chattanooga and Knoxville supporters didn't vote for Nashville, but they have already added their middle-slot preferences so nothing changes. Nashville can't lose the leading position and is thus elected.
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