@TechReport{economics.dp.2007-45,
 author = {Ricci, Luca Antonio},
 title = {A Model of an Optimum Currency Area},
 type = {Economics Discussion Paper},
 institution = {Kiel Institute for the World Economy},
 year = {2007},
 number = {2007-45},
 url = {http://www.economics-ejournal.org/economics/discussionpapers/2007-45}
}