@TechReport{economics.dp.2008-39,
 author = {Konno, Tomohiko},
 title = {Network Structure of Japanese Firms−Hierarchy and Degree Correlation: Analysis from 800,000 Firms},
 type = {Economics Discussion Paper},
 institution = {Kiel Institute for the World Economy},
 year = {2008},
 number = {2008-39},
 url = {http://www.economics-ejournal.org/economics/discussionpapers/2008-39}
}