@TechReport{economics.dp.2007-9,
 author = {Schneider, Friedrich},
 title = {Shadow Economies and Corruption All Over the World: What Do We Really Know?},
 type = {Economics Discussion Paper},
 institution = {Kiel Institute for the World Economy},
 year = {2007},
 number = {2007-9},
 url = {http://www.economics-ejournal.org/economics/discussionpapers/2007-9}
}