Hare Quota - Comparison With The Droop Quota

Comparison With The Droop Quota

The Droop quota is smaller than the Hare quota, and is more efficient when counting ballots since a candidate needs only the smaller quota to be elected. Overall the two quotas give somewhat similar results since a candidate is bound to be elected once they achieve the Droop quota, however the results often differ, particularly with regard to the allocation of the last seat, based on the transfer of preferences. In the above example, using the Droop quota, Carter would be allocated the second seat in preference to Brad, by 40 votes to 26.

  • In a multi-winner election, the Hare quota is kinder to small parties than the Droop quota because they have a slightly better chance to win the final seat.
  • In an open list multi-winner election under the Hare quota it is possible for a party supported by a clear majority of voters to receive only a minority of seats if the votes are not dispersed relatively evenly across all the party's candidates. Thus the principle of majority rule favours the Droop quota
  • In an STV election in which there is only one seat to be filled (in other words an Instant Run-off Voting election) the Hare quota is inapplicable, as the quota would be 100% of the votes cast.

The difference between the two quotas comes down to what the quota implies. Winners elected under a Hare system represent that proportion of the electorate; winners under a Droop system were elected by that proportion of the electorate.

The Droop quota is today the most frequently used quota for STV elections.

Types of majority
Single member
  • Plurality
  • Majority
  • Supermajority
  • Double majority
Multi-member (election threshold)
  • Hare quota
  • Droop quota
  • Imperiali quota
  • Hagenbach-Bischoff quota

Read more about this topic:  Hare Quota

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