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By Pietro Grilli di Cortona, Cecilia Manzi, Aline Pennisi, Federica Ricca, Bruno Simeone

This monograph deals a scientific quantitative method of the research, evaluate, and layout of electoral structures. at the present time, electoral reform is of shock to infant democracies in addition to many aged ones. The authors use mathematical versions and automated strategies, whilst attainable, to resolve the various difficulties that come up within the comparability of current structures in addition to within the building of latest ones. One virtue of the booklet is the emphasis on unmarried- and multiple-criteria optimization equipment. This strong instrument package can assist political researchers review and select a suitable electoral approach. A basic formal version is incorporated in addition to a coding method to explain, determine, and classify electoral structures. overview standards and the corresponding functionality signs are mentioned.

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Extra resources for Evaluation and Optimization of Electoral Systems

Example text

N. Consider a district j. i

Values of the Laakso-Taagepera index and the Molinar index when a third party is introduced in the system. 62 While Ny detects the increase in the number of parties and in the degree of competition by producing increasing values in the three time periods. NP decreases. , that of a one-party system, might be preferred. 3 Electoral Volatility After introducing indicators that measure the level of political participation and the number of alternatives or parties the electors can vote for, another class of pretransformation indicators, concerning the change of the choice made by the electoral body in time, must be considered.

N, just as in the first-past-the-post system. Consider district j. Let Sj be the only seat allocated to such a district. Let Vj be the total number of votes registered there, and let v\j be the number of votes received by list L^—and by its only candidate Cij—in the first round. Let Then the balloting function B is defined as follows: 24 CHAPTER 2. UNIFIED DESCRIPTION OF ELECTORAL SYSTEMS where r(0 < r < |) is a lower threshold, defining the minimum percentage of votes whereby candidates are promoted to the second round.

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