Later-no-harm criterion: Difference between revisions
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<p><em>Adding a preference to a ballot must not decrease the probability of election of any candidate ranked above the new preference.</em></p>
<h4 class=left>Complying Methods</h4>
<p>'''Later-no-harm''' is satisfied by
<h4 class=left>Commentary</h4>
'''Later-no-harm''' guarantees that the method will not use a voter's lower preferences to elect a candidate who that voter likes less than the candidate that would have been elected if this voter had kept his lower preferences a secret.
As a result, voters may feel free to vote their complete ranking of the candidates, which in turn may give the election method more complete information to use to find a winner.
'''Later-no-harm''' is incompatible with the [[Condorcet Criterion|Condorcet criterion]].
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