Click to increase image sizeClick to decrease image size Notes This paper originated in a seminar on 'Ethnic Parties' that we conducted in 1976. We thank the students who stimulated us by their participation. We want to mention especially the contribution of Ruud Meyer and Hetty Willems, who constructed a first version of the 'democratic curves'.
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Amersfoort et al. (1981) studied this question.
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