@TechReport{economics.dp.2011-45,
 author = {Heid, Benedikt and Larch, Mario},
 title = {Migration, Trade and Unemployment},
 type = {Economics Discussion Paper},
 institution = {Kiel Institute for the World Economy},
 year = {2011},
 number = {2011-45},
 url = {http://www.economics-ejournal.org/economics/discussionpapers/2011-45}
}