IDEAS home Printed from
MyIDEAS: Log in (now much improved!) to save this paper

War and Relatedness

  • Enrico Spolaore
  • Romain Wacziarg

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.

If you experience problems downloading a file, check if you have the proper application to view it first. In case of further problems read the IDEAS help page. Note that these files are not on the IDEAS site. Please be patient as the files may be large.

File URL:
Download Restriction: no

Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 15095.

in new window

Date of creation: Jun 2009
Date of revision:
Handle: RePEc:nbr:nberwo:15095
Note: POL
Contact details of provider: Postal:
National Bureau of Economic Research, 1050 Massachusetts Avenue Cambridge, MA 02138, U.S.A.

Phone: 617-868-3900
Web page:

More information through EDIRC

References listed on IDEAS
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:

as in new window
  1. Stelios Michalopoulos & Elias Papaioannou, 2011. "Divide and Rule or the Rule of the Divided? Evidence from Africa," NBER Working Papers 17184, National Bureau of Economic Research, Inc.
  2. Alesina, Alberto & Devleeschauwer, Arnaud & Wacziarg, Romain & Kurlat, Sergio & Easterly, William, 2003. "Fractionalization," Scholarly Articles 4553003, Harvard University Department of Economics.
  3. Quamrul Ashraf & Oded Galor, 2011. "Cultural Diversity, Geographical Isolation, and the Origin of the Wealth of Nations," NBER Working Papers 17640, National Bureau of Economic Research, Inc.
  4. N/A, 2006. "Economic Overview," National Institute Economic Review, National Institute of Economic and Social Research, vol. 196(1), pages 2-3, April.
  5. Fearon, James D., 1995. "Rationalist explanations for war," International Organization, Cambridge University Press, vol. 49(03), pages 379-414, June.
  6. Quamrul Ashraf & Oded Galor, 2010. "The "Out of Africa" Hypothesis, Human Genetic Diversity, and Comparative Economic Development," Working Papers 2010-7, Brown University, Department of Economics.
  7. 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.
  8. Alberto Alesina & Enrico Spolaore, 1995. "On the Number and Size of Nations," NBER Working Papers 5050, National Bureau of Economic Research, Inc.
  9. Spolaore, Enrico & Wacziarg, Romain, 2006. "The Diffusion of Development," CEPR Discussion Papers 5630, C.E.P.R. Discussion Papers.
  10. Caselli, Francesco & Morelli, Massimo & Rohner, Dominic, 2013. "The Geography of Inter-State Resource Wars," CEPR Discussion Papers 9440, C.E.P.R. Discussion Papers.
  11. 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.
  12. Gregory D. Hess & Athanasios Orphanides, 2001. "War and Democracy," Journal of Political Economy, University of Chicago Press, vol. 109(4), pages 776-810, August.
  13. Enrico Spolaore, 2008. "Civil conflict and secessions," Economics of Governance, Springer, vol. 9(1), pages 45-63, January.
  14. Stuart A. Bremer, 1992. "Dangerous Dyads," Journal of Conflict Resolution, Peace Science Society (International), vol. 36(2), pages 309-341, June.
  15. Desmet, Klaus & Le Breton, Michel & Ortuño-Ortín, Ignacio & Weber, Shlomo, 2006. "Nation Formation and Genetic Diversity," CEPR Discussion Papers 5918, C.E.P.R. Discussion Papers.
  16. Enrico Spolaore, 2009. "National Borders, Conflict and Peace," Discussion Papers Series, Department of Economics, Tufts University 0744, Department of Economics, Tufts University.
  17. Michalopoulos, Stelios & Papaioannou, Elias, 2013. "The Long-Run Effects of the Scramble for Africa," CAGE Online Working Paper Series 162, Competitive Advantage in the Global Economy (CAGE).
  18. Enrico Spolaore, 2004. "Economic Integration, International Conflict and Political Unions," Rivista di Politica Economica, SIPI Spa, vol. 94(5), pages 3-50, September.
  19. Garfinkel, Michelle R. & Skaperdas, Stergios, 2007. "Economics of Conflict: An Overview," Handbook of Defense Economics, Elsevier.
  20. Alesina, Alberto & Spolaore, Enrico, 2006. "Conflict, defense spending, and the number of nations," European Economic Review, Elsevier, vol. 50(1), pages 91-120, January.
  21. Philippe Martin & Thierry Mayer & Mathias Thoenig, 2008. "Make Trade not War?," Université Paris1 Panthéon-Sorbonne (Post-Print and Working Papers) hal-00293018, HAL.
  22. Skaperdas, Stergios, 1992. "Cooperation, Conflict, and Power in the Absence of Property Rights," American Economic Review, American Economic Association, vol. 82(4), pages 720-39, September.
  23. Esteban, J. & Ray, D., 1993. "On the Measurement of Polarization," UFAE and IAE Working Papers 221.93, Unitat de Fonaments de l'Anàlisi Econòmica (UAB) and Institut d'Anàlisi Econòmica (CSIC).
  24. Yared, Pierre, 2010. "A dynamic theory of war and peace," Journal of Economic Theory, Elsevier, vol. 145(5), pages 1921-1950, September.
  25. Enrico Spolaore & Alberto Alesina, 2001. "War, Peace and the Size of Countries," Harvard Institute of Economic Research Working Papers 1937, Harvard - Institute of Economic Research.
  26. Jackson, Matthew O. & Morelli, Massimo, . "Political bias and war," Working Papers 1247, California Institute of Technology, Division of the Humanities and Social Sciences.
  27. Fearon, James D, 2003. "Ethnic and Cultural Diversity by Country," Journal of Economic Growth, Springer, vol. 8(2), pages 195-222, June.
  28. Bernheim, B. Douglas & Peleg, Bezalel & Whinston, Michael D., 1987. "Coalition-Proof Nash Equilibria I. Concepts," Journal of Economic Theory, Elsevier, vol. 42(1), pages 1-12, June.
  29. Spolaore, Enrico & Wacziarg, Romain, 2012. "How Deep Are the Roots of Economic Development?," CEPR Discussion Papers 8998, C.E.P.R. Discussion Papers.
  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. Levy, Gilat & Razin, Ronny, 2003. "It Takes Two: An Explanation of the Democratic Peace," CEPR Discussion Papers 3947, C.E.P.R. Discussion Papers.
  32. 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.
  33. Garfinkel, Michelle R, 1994. "Domestic Politics and International Conflict," American Economic Review, American Economic Association, vol. 84(5), pages 1294-1309, December.
  34. 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.
  35. 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.
  36. Hess, Gregory D & Orphanides, Athanasios, 1995. "War Politics: An Economic, Rational-Voter Framework," American Economic Review, American Economic Association, vol. 85(4), pages 828-46, September.
Full references (including those not matched with items on IDEAS)

This item is not listed on Wikipedia, on a reading list or among the top items on IDEAS.

When requesting a correction, please mention this item's handle: RePEc:nbr:nberwo:15095. See general information about how to correct material in RePEc.

For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: ()

If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

If references are entirely missing, you can add them using this form.

If the full references list an item that is present in RePEc, but the system did not link to it, you can help with this form.

If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your profile, as there may be some citations waiting for confirmation.

Please note that corrections may take a couple of weeks to filter through the various RePEc services.

This information is provided to you by IDEAS at the Research Division of the Federal Reserve Bank of St. Louis using RePEc data.