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War and Relatedness

  • Spolaore, Enrico
  • Wacziarg, Romain

We develop a theory of interstate conflict in which the degree of genealogical relatedness between populations has a positive effect on their conflict propensities because more closely related populations, on average, tend to interact more and develop more disputes over sets of common issues. We examine the empirical relationship between the occurrence of interstate conflicts and the degree of relatedness between countries, showing that populations that are genetically closer are more prone to go to war with each other, even after controlling for a wide set of measures of geographic distance and other factors that affect conflict, including measures of trade and democracy.

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Paper provided by C.E.P.R. Discussion Papers in its series CEPR Discussion Papers with number 7371.

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Date of creation: Jul 2009
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Handle: RePEc:cpr:ceprdp:7371
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  1. Quamrul Ashraf & Oded Galor, 2010. "The "Out of Africa" Hypothesis, Human Genetic Diversity, and Comparative Economic Development," Center for Development Economics 2010-03, Department of Economics, Williams College, revised Dec 2012.
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  18. Quamrul Ashraf & Oded Galor, 2008. "Human Genetic Diversity and Comparative Economic Development," 2008 Meeting Papers 617, Society for Economic Dynamics.
  19. Yared, Pierre, 2010. "A dynamic theory of war and peace," Journal of Economic Theory, Elsevier, vol. 145(5), pages 1921-1950, September.
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  23. Stelios Michalopoulos & Elias Papaioannou, 2011. "Divide and Rule or the Rule of the Divided? Evidence from Africa," Economics Working Papers 0099, Institute for Advanced Study, School of Social Science.
  24. Enrico Spolaore, 2009. "National Borders, Conflict and Peace," CESifo Working Paper Series 2860, CESifo Group Munich.
  25. Faten Ghosn & Glenn Palmer & Stuart A. Bremer, 2004. "The MID3 Data Set, 1993—2001: Procedures, Coding Rules, and Description," Conflict Management and Peace Science, Peace Science Society (International), vol. 21(2), pages 133-154, April.
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  29. Fearon, James D., 1995. "Rationalist explanations for war," International Organization, Cambridge University Press, vol. 49(03), pages 379-414, June.
  30. Daniel M. Jones & Stuart A. Bremer & J. David Singer, 1996. "Militarized Interstate Disputes, 1816–1992: Rationale, Coding Rules, and Empirical Patterns," Conflict Management and Peace Science, Peace Science Society (International), vol. 15(2), pages 163-213, September.
  31. Alberto Bisin & Thierry Verdier, 2000. ""Beyond the Melting Pot": Cultural Transmission, Marriage, and the Evolution of Ethnic and Religious Traits," The Quarterly Journal of Economics, Oxford University Press, vol. 115(3), pages 955-988.
  32. Enrico Spolaore, 2004. "Economic Integration, International Conflict and Political Unions," Rivista di Politica Economica, SIPI Spa, vol. 94(5), pages 3-50, September.
  33. Ashraf, Quamrul & Galor, Oded, 2007. "Cultural Assimilation, Cultural Diffusion and the Origin of the Wealth of Nations," CEPR Discussion Papers 6444, C.E.P.R. Discussion Papers.
  34. Louis Putterman & David N. Weil, 2010. "Post-1500 Population Flows and The Long-Run Determinants of Economic Growth and Inequality," The Quarterly Journal of Economics, Oxford University Press, vol. 125(4), pages 1627-1682.
  35. Klaus Desmet & Michel Breton & Ignacio Ortuño-Ortín & Shlomo Weber, 2011. "The stability and breakup of nations: a quantitative analysis," Journal of Economic Growth, Springer, vol. 16(3), pages 183-213, September.
  36. Alberto Alesina & Enrico Spolaore, 1997. "On the Number and Size of Nations," The Quarterly Journal of Economics, Oxford University Press, vol. 112(4), pages 1027-1056.
  37. James H. Stock & Francesco Trebbi, 2003. "Retrospectives: Who Invented Instrumental Variable Regression?," Journal of Economic Perspectives, American Economic Association, vol. 17(3), pages 177-194, Summer.
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