Last month, Chile’s president, Michelle Bachelet, signed into law the first major bill that aims to fulfil her electoral promise of constitutional reform. The bill is designed to overhaul the country’s unpopular binomial electoral system, designed in 1984 by Augusto Pinochet’s military regime, to preserve the power of the right wing after Chile’s transition to democracy.
Chile is currently the only country in the world to use the binomial system, its only other use being Poland’s brief experiment with the process during the 1980s.
Under the binomial model, two parliamentary seats are available per geographical constituency and seats are won by the two political parties with the highest percentage share of votes. Parties must obtain 33.4 percent of the vote to win one seat and 66.7 percent to win both.
The practical result is that Chile’s right-wing coalition has consistently retained half of the available congressional seats, despite only ever winning at most a third of the public vote. (more…)
