@techreport{NBERw15560,
 title = "National Borders, Conflict and Peace",
 author = "Enrico Spolaore",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "15560",
 year = "2009",
 month = "December",
 URL = "http://www.nber.org/papers/w15560",
 abstract = {This paper reviews the economics approach to conflict and national borders. The paper provides a summary of ideas and concepts from the economics literature on the size of nations; illustrates them within an analytical framework where populations engage in conflict over borders and resources, and may form non-aggression pacts, military alliances, and political unions; and discusses extensions and directions for further research.},
}