Droop method意思

"Droop method" is a term used in the context of electoral systems, specifically in the design of proportional representation (PR) systems. It refers to a method for calculating the number of seats a party or coalition of parties should be allocated in a legislature, given the proportion of the vote they received in an election.

The Droop quota is a means of ensuring that seats in a legislature are distributed in a way that reflects the proportion of the vote received by each party or coalition. It is named after Thomas Hare's colleague, Thomas Hare Droop, who suggested a modification to Hare's original method for calculating quotas.

The Droop quota is calculated by dividing the total number of votes cast by one more than the number of seats to be filled, plus one. This ensures that a party or coalition must receive a majority of votes to win a majority of seats.

The Droop method is used in various PR systems around the world, including the Additional Member System (AMS) used in some German states and the Scottish and Welsh devolved parliaments. It is designed to ensure that the proportion of seats held by each party or coalition in the legislature closely reflects the proportion of the vote they received in the election.