The Impact of Indirect Connections: The Case of Food Security Problem
We propose a family of new measures for edge importance estimation. We focus on weighted directed networks where weights indicate the intensity of connections between nodes. We reward edges that increase node-to-node influence compared to direct connections between them. This approach allows to reveal hidden channels of the influence in networks. We apply the proposed model to food export/import networks in order to elucidate the most important trading relations. We compare the results with edge-betweenness centrality and investigate the interdependence between edge importance and centrality measures of corresponding source and sink nodes. The results are provided in dynamic.
KeywordsEdge importance Indirect influence Food security network
The article was prepared within the framework of the Basic Research Program at the National Research University Higher School of Economics (HSE) and supported within the framework of a subsidy by the Russian Academic Excellence Project ‘5-100’. This work is also supported by the Russian Foundation for Basic Research under grant №18-01-00804a Power of countries in the food security problem.
- 2.Page L., Brin S., Mot wani R., Winograd T. (1998) The PageRank Citation Ranking: Bringing Order to the Web, Technical report, Stanford Digital Library Technologies ProjectGoogle Scholar
- 5.De Meo, P., Ferrara, E., Fiumara, G., Ricciardello, A.: A novel measure of edge centrality in social networks. Knowl.-Based Syst. 30 (2012) https://doi.org/10.1016/j.knosys.2012.01.007
- 8.Mavroforakis, C., Garcia-Lebron, R., Koutis, I., Terzi, E.: Spanning edge centrality: large-scale computation and applications. In: WWW (2015)Google Scholar
- 9.Ortiz-Gaona, R., Postigo-Boix, M., Melus, J.: Centrality metrics and line-graph to measure the importance of links in online social networks. Int. J. New Technol. Res. 2(12), 20–26 (2016)Google Scholar
- 10.Aleskerov, F.T., Meshcheryakova, N.G., Shvydun, S.V.: Power in network structures. In: Kalyagin, V.A., Nikolaev, A.I., Pardalos, P.M., Prokopyev, O. (eds.) Models, Algorithms, and Technologies for Network Analysis. Springer Proceedings in Mathematics and Statistics, vol. 197, pp. 79–85. Springer (2017)Google Scholar
- 11.www.fao.org (2018). SOFI 2018 - The State of Food Security and Nutrition in the World. http://www.fao.org/state-of-food-security-nutrition/en/. Accessed 5 Sep. 2018
- 12.Simon, G.A.: Food Security: Definition, Four dimensions, History. University of Roma Tre, Rome (2012)Google Scholar
- 13.Global Hunger Index - A Peer-Reviewed Publication (2018). Global Hunger Index - Official Website of the Peer-Reviewed Publication. http://ghi.ifpri.org/. Accessed 5 Sep. 2018
- 14.foodsecurityindex.eiu.com (2018). The Global Food Security Index. http://foodsecurityindex.eiu.com/. Accessed 5 Sep. 2018
- 15.Wits.worldbank.org (2018). WITS - About WITS. https://wits.worldbank.org/about_wits.html. Accessed 5 Sep. 2018