D'Hondt method

The D'Hondt method, also called the Jefferson method or the greatest divisors method, is an apportionment method for allocating seats in parliaments among federal states, or in proportional representation among political parties. It belongs to the class of highest-averages methods. The D'Hondt method reduces compared to ideal proportional representation somewhat the political fragmentation for smaller electoral district sizes, where it favors larger political parties over small parties.

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The method was first described in 1792 by American Founder Thomas Jefferson. It was re-invented independently in 1878 by Belgian mathematician Victor D'Hondt, which is the reason for its two different names.

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