1. Political Economy of Large Natural Disasters;Albala-Bertrand,1993
2. International measures of schooling years and schooling quality;Barro;American Economic Review,1996
3. The Environment as Hazard;Burton,1993
4. EM-DAT: The OFDA/CRED International Disaster Database, www.em-dat.net, Université Catholique de Louvain, Brussels, Belgium.
5. Heston, A., Summers, R., Aten, B., 2002. Penn world table version 6.1, Center for International Comparisons at the University of Pennsylvania (CICUP), taken from the web page, http://pwt.econ.upenn.edu/.