El ciclo político económico en Chile en el último medio siglo [The Chilean Sustituye el sistema electoral binominal por uno de carácter proporcional inclusivo. A su vez, el sistema partidista chileno ha experimentado notorias Constitucional de Partidos Políticos y sistema electoral binominal. Estado, con el apoyo del Sistema de Naciones Unidas. Durante de la Mujer y Equidad de Género; la Reforma al sistema electoral binominal.


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Voting power of political parties in the Senate of Chile during the whole binomial system period: It was used to elect the sistema binomial chileno and deputies of Chile during 27 years, from the return of democracy in until In this paper we study the real voting power of the different political parties in the Senate of Chile during the whole binomial period.

We not only consider sistema binomial chileno different legislative periods, but also any party changes between one period and the next.


The real voting power is measured by considering power indices from cooperative game theory, which are based on the capability of the political parties to form winning coalitions. With this approach, we can do an analysis that goes beyond the simple count of parliamentary seats.

Senate of Chile, voting system, voting power, power index, binomial system 1 Introduction Today, all Latin American countries have a congress or assembly, which represents the legislative power of their nation. These bodies can be classified as two types: In Chile, legislative power lies with the National Congress, a sistema binomial chileno body with a Senate and a Chamber of Deputies.

Each parliamentary sistema binomial chileno represents a geographic sector of the country.

Índices de Poder - Senado de Chile Power Indices - Senate of Chile

With regards to its structure, the Congress of Chile is no different most other bicameral bodies. Since return to democracy inparliamentary elections in Chile have taken place every four years, and as of this writing, the last one took place in November Over the last 28 years, these sistema binomial chileno have been governed by the provisions of the current Political Constitution ofestablished during the period of military dictatorship, and any subsequent amendments.

Throughout this period, parliamentary elections were carried out through an electoral process known as the binomial system, the only one of its kind in the world. The binomial sistema binomial chileno assigns two parliamentary seats to each electoral entity.

For example, if two Candidates X and Y of the same political coalition have double the number of votes than another Candidate Z, then Candidates X and Sistema binomial chileno assume two seats, to the detriment of Candidate Z, even though the latter may have received more votes than X or Y when considered independently.


This system has been very controversial. According to Naviaat least untilthe sistema binomial chileno right coalition benefited the most from the binomial system. In NovemberChile faced a major change in the election of its senators and deputies. This will give rise to important changes in district and regional Riquelme and Gonzalez, representation and voting power.


As a result, we can discuss the period of return to democracy, between andas a distinctive epoch in the history of the Chilean legislative system. We restrict our analysis to the Senate, sistema binomial chileno to the considerable effort required to accounting for all changes in the political system and in politicians holding congressional seats either because of a change in legislative period, illness, sistema binomial chileno, or other extenuating circumstances.

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Power indices come from cooperative game theory, a multidisciplinary approach sistema binomial chileno in the s for the formal study of cooperation and conflict situations in rational decision-making processes von Neumann and Morgenstern, Power indices are sistema binomial chileno related to the capacity of each voter to form winning coalitions, which are a central structure in the study of voting systems Riker, Various electoral systems in Europe and North America have been studied using this approach, with the determination of the real voting power of different politicians involved in each voting system as one of its main outcomes Taylor and Pacelli, Despite this, the voting systems used in Latin America have rarely been studied with power indices.

This study is presented as a crucial contribution to understanding how the Senate of Chile operates, complementing other approaches like those previously mentioned.

These techniques can also be replicated by the study of the voting systems in other countries. The rest of the paper is organized as follows. In the next section, we describe the different political parties that have been represented in the Senate of Chile sistema binomial chileno andas well as their political coalitions and political tendencies.

Then we describe and analyze the changes in the political tendencies of the senators during that period.