@TechReport{economics.dp.2010-5,
 author = {Beckert, Walter and Mazzarotto, Nicola},
 title = {Price-Concentration Analysis in Merger Cases with Differentiated Products},
 type = {Economics Discussion Paper},
 institution = {Kiel Institute for the World Economy},
 year = {2010},
 number = {2010-5},
 url = {http://www.economics-ejournal.org/economics/discussionpapers/2010-5}
}