@TechReport{economics.dp.2007-48,
 author = {Smith, Ron and Zoega, Gylfi},
 title = {Global Factors, Unemployment Adjustment and the Natural Rate},
 type = {Economics Discussion Paper},
 institution = {Kiel Institute for the World Economy},
 year = {2007},
 number = {2007-48},
 url = {http://www.economics-ejournal.org/economics/discussionpapers/2007-48}
}