@TechReport{economics.dp.2011-20,
 author = {Anderson, Gordon},
 title = {Polarization Measurement and Inference in Many Dimensions When Subgroups Cannot be Identified},
 type = {Economics Discussion Paper},
 institution = {Kiel Institute for the World Economy},
 year = {2011},
 number = {2011-20},
 url = {http://www.economics-ejournal.org/economics/discussionpapers/2011-20}
}