Multi-round voting
Ranked / preferential systems
Cardinal / graded systems
Proportional forms of ranked voting
Proportional forms of cardinal voting
Biproportional apportionment
Fair majority voting
Weighted voting
Non-compensatory mixed systems
Compensatory mixed systems
Other systems
Social choice theory
List of electoral systems
Effects of electoral systems
The Imperiali quota or pseudoquota is an inadmissible electoral quota used to calculate the number of votes needed to earn a seat in single transferable vote or largest remainder elections. It is named after Belgian senator Pierre Imperiali.
The Czech Republic is the only country that currently uses this allocation system,[citation needed] while Italy and Ecuador used it in the past.
It is possible for elections using the Imperiali quota to have more candidates win quota than there are vacancies to fill. If this occurs, the result needs to be recalculated with a higher quota (usually the Droop quota).[citation needed] If this does not happen, Imperiali distributes seats in a way that is a hybrid between majoritarian and proportional representation.
The Imperiali quota may be given as:
However, Imperiali violates the inequality for a valid quota:
votes seats + 1 ≤ ≤ --> electoral quota ≤ ≤ --> votes seats − − --> 1 {\displaystyle {\frac {\mbox{votes}}{{\mbox{seats}}+1}}\leq {\mbox{electoral quota}}\leq {\frac {\mbox{votes}}{{\mbox{seats}}-1}}}
This can lead to impossible allocations that assign parties more seats than actually exist.
To see how the Imperiali quota works in an STV election imagine an election in which there are two seats to be filled and three candidates: Andrea, Carter and Brad. There are 100 voters as follows:
65 voters
15 voters
20 voters
There are 100 voters and 2 seats. The Imperiali quota is therefore:
To begin the count the first preferences cast for each candidate are tallied and are as follows:
Andrea has more than 25 votes. She therefore has reached the quota and is declared elected. She has 40 votes more than the quota so these votes are transferred to Carter. The tallies therefore become:
Carter has now reached the quota so he is declared elected. The winners are therefore Andrea and Carter.
Lokasi Pengunjung: 3.141.4.3