The binomial system (Spanish: Sistema binominal) is a voting system that was used in the legislative elections of Chile between 1989 and 2013. From an electoral system point of view, the binomial system is in effect the D'Hondt method with an open list where every constituency returns two (hence the name) representatives to the legislative body. The fact that only two candidates are elected in each district results in the peculiarity where the second majority list is overrepresented. Its use was prescribed in the respective constitutional organic law during the Pinochet regime.