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Selection Bias in Comparative Research: The Case of Incomplete Data Sets

  • Simon Hug (a1)

Selection bias is an important but often neglected problem in comparative research. While comparative case studies pay some attention to this problem, this is less the case in broader cross-national studies, where this problem may appear through the way the data used are generated. The article discusses three examples: studies of the success of newly formed political parties, research on protest events, and recent work on ethnic conflict. In all cases the data at hand are likely to be afflicted by selection bias. Failing to take into consideration this problem leads to serious biases in the estimation of simple relationships. Empirical examples illustrate a possible solution (a variation of a Tobit model) to the problems in these cases. The article also discusses results of Monte Carlo simulations, illustrating under what conditions the proposed estimation procedures lead to improved results.

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José Barranco , and Dominique Wisler . 1999. “Validity and Systematicity of Newspaper Data in Event Analysis.” European Sociological Review 15(3): 301322.

David E. Bloom , and Mark R. Killingsworth 1985. “Correcting for Truncation Bias Caused by a Latent Truncation Variable.” Journal of Econometrics 27:131135.

Richard Breen . 1996. Regression Models: Censored, Sample Selected or Truncated Data. Thousand Oaks, CA: Sage.

John Brehm . 1993. The Phantom Respondents. Opinion Surveys and Political Representation. Ann Arbor: University of Michigan Press.

John Brehm . 2000. “Alternative Corrections for Sample Truncation: Applications to the 1988 and 1990 Senate Election Studies.” Political Analysis 8:183199.

Frank S. Cohen 1997. “Proportional Versus Majoritarian Ethnic Conflict Management in Democracies.” Comparative Political Studies 30:607630.

Gary W. Cox 1997. Making Votes Count. Cambridge: Cambridge University Press.

Douglas Dion . 1998. “Evidence and Inference in the Comparative Case Study.” Comparative Politics 30:127145.

James D. Fearon 1991. “Counterfactuals and Hypothesis Testing in Political Science.” World Politics 43:169195.

Robert Gurr Ted , and Will H. Moore 1997. “Ethnopolitical Rebellion: A Cross-Sectional Analysis of the 1980s with Risk Assessments for the 1990s.” American Journal of Political Science 41:10791103.

Robert Harmel , and John D. Robertson 1985. “Formation and Success of New Parties.” International Political Science Review 6:501523.

Simon Hug . 1996. “Altering the Electoral Scene. The Emergence of New Political Parties from a Game-Theoretic Perspective.” European Journal of Political Research 29:169190.

Simon Hug . 2000. “Studying the Electoral Success of New Political Parties. A Methodological Note.” Party Politics 6:187197.

Simon Hug . 2001. Altering Party Systems. Strategic Behavior and the Emergence of New Political Parties in Western Democracies. Ann Arbor: University of Michigan Press.

Herbert Kitschelt . 1988. “Left-Libertarian Parties. Explaining Innovation in Competitive Party Systems.” World Politics 40:194234.

Arend Lijphart , and Robert W. Gibberd 1977. “Thresholds and Payoffs in List Systems of Proportional Representation.” European Journal of Political Research 5:219244.

Ian S. Lustick 1996. “History, Historiography, and Political Science: Multiple Historical Records and the Problem of Selection Bias.” American Political Science Review 90:605618.

G. S. Maddala 1983. Limited Dependent and Qualitative Variables in Econometrics. Cambridge: Cambridge University Press.

John D. McCarthy , Clark McPhail , and Jackie Smith . 1996. “Images of Protest: Dimensions of Selection Bias in Media Coverage of Washington Demonstrations, 1982 and 1991.” American Sociological Review 61:478499.

Ferdinand Müller-Rommel . 1993. Grüne Parteien in Westeuropa. Entwicklungsphasen und Erfolgsbedingungen. Opladen: Westdeutscher Verlag.

Bengt Muthen , and Karl G. Jöreskog 1983. “Selectivity Problems in Quasi-Experimental Studies.” Evaluation Review 7:139174.

Adam Przeworski , Michael E. Alvarez , José Antonio Cheibub , and Fernando Limongi . 2000. Democracy and Development: Political Institutions and Well-Being in the World, 1950-1990. New York: Cambridge University Press.

Lee Sigelman , and Langche Zeng . 2000. “Analyzing Censored and Sample-Selected Data with Tobit and Heckit.” Political Analysis 8:167182.

Ross M. Stolzenberg , and Daniel A. Relles 1997. “Tools for Intuition about Sample Selection Bias and Its Correction.” American Sociological Review 62:494506.

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Political Analysis
  • ISSN: 1047-1987
  • EISSN: 1476-4989
  • URL: /core/journals/political-analysis
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