The D'Hondt method (also known as Jefferson's method and Bader-Ofer method) is a highest averages method for allocating seats in party-list proportional representation. The method described is named in United States after Thomas Jefferson, who introduced the method for proportional allocation of seats in United States House of Representatives in 1791, and in Europe after Belgian mathematician Victor D'Hondt, who described it in 1878 for proportional allocation of parliamentary seats to the parties. There are two forms: closed list (a party selects the order of election of their candidates) and an open list (voters' choices determine the order).