A coalition formation in parliamentary democracies as a multicriteria voting game
摘要
In the multicriteria voting game, we assume a set of political parties, a set of political programs with multiple policy dimensions, and a set of objective functions. The objective of each political party is to minimize the maximum distance between the coalition program and its own program, to maximize its share of power in the winning coalition, and to maximize the stability of the winning coalition, which is measured as the maximum distance between the coalition program and the individual programs of all political parties in the coalition. The coalition program is formulated as a weighted average of the individual political programs. The multicriteria voting game model is applied to the Chamber of Deputies of the Parliament of the Czech Republic in Spring 2024. Deputies were surveyed using a questionnaire that included questions on 16 policy dimensions. For each policy dimension, deputies selected from five text responses. The data obtained was used to calculate the optimal winning coalition. The predicted optimal winning coalition of SPOLU and Piráti + STAN corresponds to the existing governing coalition in the Czech Republic.