Looking at the elements of electoral reform and existing party systems to Chile led us to look again to longer term evidence than current news articles. We noted Peter Siavelis’ research on Chile’s party system which brings up the effect of a 1989 change from multiple member districts to two member districts. Applicable to the discussion on the endogenous relationship between electoral reform and party systems, he uses the 1989 electoral reform in Chile as a useful example for analysts because electoral reform was made by the outgoing military regime, not from bargaining between political parties.
On the effect of electoral reform in Chile, he says
“In Chile, limited electoral reform has had, and will continue to have, limited effects on the party system depending on the dynamic interaction of the incentives and drives operating within the party system, a few of which has been described here. Given the elements of continuity within the party system, the continued ability of parties to form joint lists, and the existence of a PR electoral system for municipal elections, it is doubtful that the binomial system will discourage party system fragmentation or necessarily lead to a pattern of centripetal competition as many scholars have suggested. The question for the long term, as the shadow of the authoritarian regime fades, is whether the incentives for the maintenance of coalitions are stronger than those produced by the elements of continuity within the party system.”
In the decade since this article was written we see that the two main coalitions in Chile, Concertacion and Alianza, remain intact and dominating politics. For presidential elections, the vote split has been more characteristically bipolar, with the two major coalitions collectively getting above 80% in the 1989, 1993 and 1999 elections, whereas in legislative elections there has been a much clearer ideological split between three forces of the left, center, and right parties. But, as seen in the 2005 Presidential elections, two parties from the same Alianza coalition offered different Presidential candidates to voters, indicating the difficulty in keeping the coalition intact.
It is difficult to answer the question Siavelis poses at the end of the above paragraph above in a single blog entry, about whether the coalition’s importance has trumped the party importance since 1997. However, looking at the political divisions mentioned above seems clear that support for the two coalitions have not made the component individual parties redundant.
Siavelis, Peter. Transformational Effects of Electoral Reform Continuity and Change in the Chilean Party System. Comparative Political Studies 1997; 30; 651
Montes, Esteban. Mainwaring, Scott, Ortega, Eugenio. Rethinking the Chilean Party System. Journal of Latin American Studies, Vol. 32, No. 3. (Oct., 2000), pp. 795-824.
By: Chile Group