@TechReport{economics.dp.2007-31,
 author = {Selim, Sheikh},
 title = {On Policy Relevance of Ramsey Tax Rules},
 type = {Economics Discussion Paper},
 institution = {Kiel Institute for the World Economy},
 year = {2007},
 number = {2007-31},
 url = {http://www.economics-ejournal.org/economics/discussionpapers/2007-31}
}