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On revolutions

Journal article
Authors A. M. Leroi
B. Lambert
M. Mauch
M. Papadopoulou
S. Ananiadou
Staffan I Lindberg
Patrik Lindenfors
Published in Palgrave Communications
Volume 6
Pages 11
ISSN 2055-1045
Publication year 2020
Published at Department of Political Science
V-Dem Institute
Pages 11
Language en
Keywords punctuated equilibrium, paradigm shift, evolution, origin, tempo, speciation, jumps, rates, mode, Social Sciences - Other Topics
Subject categories Political Science


Sometimes the normal course of events is disrupted by a particularly swift and profound change. Historians have often referred to such changes as "revolutions", and, though they have identified many of them, they have rarely supported their claims with statistical evidence. Here, we present a method to identify revolutions based on a measure of multivariate rate of change called Foote novelty. We define revolutions as those periods of time when the value of this measure is, by a non-parametric test, shown to significantly exceed the background rate. Our method also identifies conservative periods when the rate of change is unusually low. We apply it to several quantitative data sets that capture long-term political, social and cultural changes and, in some of them, identify revolutions - both well known and not. Our method is general and can be applied to any phenomenon captured by multivariate time series data of sufficient quality.

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