Henry Richmond Droop (12 September 1832 – 21 March 1884) was an

English English usually refers to: * English language * English people English may also refer to: Peoples, culture, and language * ''English'', an adjective for something of, from, or related to England ** English national ide ...

mathematician A mathematician is someone who uses an extensive knowledge of mathematics in their work, typically to solve mathematical problems. Mathematicians are concerned with numbers, data, quantity, structure, space, models, and change. History On ...

. He devised the

Droop quota The Droop quota is the quota most commonly used in elections held under the single transferable vote (STV) system. It is also sometimes used in elections held under the largest remainder method of party-list proportional representation (list PR). ...

used in the

Single Transferable Vote Single transferable vote (STV) is a multi-winner electoral system in which voters cast a single vote in the form of a ranked-choice ballot. Voters have the option to rank candidates, and their vote may be transferred according to alternate p ...

. He also may have been the first to write down what later became known as Duverger's Law, in 1869. He married Clara Baily (ca. 1841 – 7 September 1921) on 17 August 1872 and was the father of archaeologist John Percival Droop (1882–1963).

References

* https://web.archive.org/web/20110819150834/http://ksimmon.sasktelwebsite.net/PS06/PS06_157.HTM * Henry R. Droop, On Methods of Electing Representatives, ''Journal of the Statistical Society of London'', Vol. 44, No. 2. (Jun., 1881), pp. 141–202 (Reprinted in ''

Voting matters ''Voting matters'' was a peer-reviewed academic journal whose purpose is "To advance the understanding of preferential voting systems". Originally published by the Electoral Reform Society (1994–2003), ''Voting matters'' then became a publication ...

''
No. 24 (Oct., 2007), pp. 7-46
*

William H. Riker William Harrison Riker (September 22, 1920 – June 26, 1993) was an American political scientist who is prominent for applying game theory and mathematics to political science. He helped to establish University of Rochester as a center of behav ...

''Duverger's Law: Forty Years Later''. From Grofman and Lijphart ''Electoral Laws and their political consequences'' 1986. 1832 births 1884 deaths 19th-century English mathematicians {{UK-mathematician-stub