Party Competition in a Multiparty System. An Empirical Study of Dutch Party Competition 1982-2010

Party competition lies at the heart of every democracy. It is related to party organization and electoral behavior. There is no consensus on what the political space of competition looks like. The left-right dimension is the most well-known model of party competition. However, especially in multiparty systems, with multiple salient issues each election, locating parties in a predefined onedimensional space is very unlikely to capture all differences between parties. This study addresses the question what the spatial representation of party competition in multiparty systems looks like. Is it indeed structured along a left-right dimension, or are multiple dimensions necessary to understand competition? It has been argued before that competition in multiparty systems is best understood using multiple dimensions. However, this is the first study that investigates whether the left-right dimension gives accurate information about party competition both deterministically and...Show moreParty competition lies at the heart of every democracy. It is related to party organization and electoral behavior. There is no consensus on what the political space of competition looks like. The left-right dimension is the most well-known model of party competition. However, especially in multiparty systems, with multiple salient issues each election, locating parties in a predefined onedimensional space is very unlikely to capture all differences between parties. This study addresses the question what the spatial representation of party competition in multiparty systems looks like. Is it indeed structured along a left-right dimension, or are multiple dimensions necessary to understand competition? It has been argued before that competition in multiparty systems is best understood using multiple dimensions. However, this is the first study that investigates whether the left-right dimension gives accurate information about party competition both deterministically and probabilistically. First, the formal logic behind the empirical use of the left-right dimension is tested. In other words, it is investigated whether the necessary conditions for one-dimensional competition hold in a multiparty system. Additionally, it is investigated how much information is gained when the space of competition is modeled probabilistically, without the a priori assumption that competition is one-dimensional. Focusing on party competition in the Netherlands, it is found that in all election years from 1982 to 2010 left-right party positions did not give an accurate representation of Dutch competition. Rather, two-dimensional spaces are necessary. Especially ethical issues and the issue of European integration cannot be squeezed into an overarching left-right dimension.Show less

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Party Competition in a Multiparty System. An Empirical Study of Dutch Party Competition 1982-2010