How similar are they? rethinking electoral congruence
Electoral continuity and discontinuity have been a staple of voting research for decades. Most researchers have employed Pearson’s r as a measure of congruence between two electoral outcomes across a set of geographic units. This paper argues that that practice should be abandoned. The correlation coefficient is a measure of linearity, not similarity, and is almost always the wrong measure. The paper recommends other quantities that better accord with what researchers usually mean by electoral persistence. Replications of prior studies in American and comparative politics demonstrate that the consequences of using r when it is inappropriate can be stark. In some cases what we think are continuities are actually discontinuities.
KeywordsElections Voting Continuity Similarity Correlation Concordance
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- Achen C.H., Shively W.P.: Cross-Level Inference. University of Chicago Press, Chicago (1995)Google Scholar
- Atkinson G., Nevill A.: Comment on the use of concordance correlation to assess the agreement between two variables. Biometrics 53(2), 775–777 (1997)Google Scholar
- Caramani D.: Elections in Western Europe Since 1815: Electoral Results by Constituencies. MacMillan, London (2000)Google Scholar
- Key V.O.: Southern Politics. A.A. Knopf, New York (1949)Google Scholar
- Key V.O. Jr., Munger F.: Social determinism and electoral decision: the case of Indiana. In: Burdick, E., Broadbeck, A.J. (eds) American Voting Behavior, pp. 281–299. Greenwood Press, Westport, CT (1959)Google Scholar
- King G.: A Solution to the Ecological Inference Problem: Reconstructing Individual Behavior from Aggregate Data. Princeton University Press, Princeton (1997)Google Scholar
- Linz J.J.: The new Spanish party system. In: Rose, R. (eds) Electoral Participation: A Comparative Analysis, pp. 101–189. Sage, Beverly Hills, CA (1980)Google Scholar
- Linz, J. J., De Miguel, J. M.: Hacia un análisis regional de las elecciones de 1936 en España. Revista Española De La Opinion Publica, No. 48 (Abril–Juno), pp. 27–68 (1977)Google Scholar
- Maravall J.: The Transition to Democracy in Spain. Croom Helm, London & Canberra (1982)Google Scholar
- Valenzuela S.J., Scully T.R.: Electoral choices and the party system in Chile: continuities and changes at the recovery of democracy. Comparative Political Studies 29(4), 511–527 (1997)Google Scholar
- Wand J.N., Shotts K.W., Sekhon J.S., Mebane W.R. Jr., Herrron M.C., Brady H.E.: The butterfly did it: the aberrant vote for buchanan in palm beach county, Florida. American Political Science Review 95(4), 793–810 (2001)Google Scholar