This paper reviews the economics approach to conflict and national borders. The paper (a) provides a summary of ideas and concepts from the economics literature on the size of nations; (b) illustrates them within a simple analytical framework where populations fight over borders and resources,...

National borders are still strong barriers for mergers and acquisitions in Europe. We estimate a gravity equation model based on NUTS 2-regions and find that the restraining impact of national borders decreased by about a third between 1990 and 2007. However, there has been no significant change...