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Varieties of Democracy: Measuring Two Centuries of Political Change. By Michael Coppedge, John Gerring, Adam Glynn, Carl Henrik Knutsen, Staffan I. Lindberg, Daniel Pemstein, Brigitte Seim, Svend-Erik Skaaning, and Jan Teorell. Cambridge: Cambridge University Press, 2020. 226p. $99.99 cloth. - Volume 18 Issue 4
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Dániel Hegedüs (2020) studied this question.
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