@TechReport{economics.dp.2011-2,
 author = {de Carvalho Andrade, Eduardo  and de Castro, Luciano I. },
 title = {Tougher Educational Exam Leading to Worse Selection},
 type = {Economics Discussion Paper},
 institution = {Kiel Institute for the World Economy},
 year = {2011},
 number = {2011-2},
 url = {http://www.economics-ejournal.org/economics/discussionpapers/2011-2}
}