Chile: Electoral reform in Chile: Tie breaker | The Economist
Augusto Pinochet left the scene as Chile’s dictator 25 years ago, but the electoral system he bequeathed has governed politics ever since. Under the country’s unique “binominal” system, each parliamentary constituency has two seats; the winning candidate takes one and in most cases the runner-up takes the other. This has reserved nearly all the seats in parliament for two big coalitions, the centre-left New Majority (to which the president, Michelle Bachelet, belongs) and the centre-right Alliance. The system has brought Chile stability at the expense of diversity. It kept small parties out of parliament unless they joined one of the two big coalitions, and ruled out landslide victories by either side. Moreover, it has tended to over-represent the Alliance at the expense of New Majority. Rural areas, which had supported Pinochet, were given more weight than their populations warranted.