In this paper, we contrast two different views in the debate on official dollarization. The Mundell (1961) framework of optimal currency areas and a model on boom-bust cycles, by Schneider and Tornell (2004), who take account of credit market imperfections prevalent in middle income countries....

Frankel and Rose (1997, 1998) state that greater intensity of trading leads to more highly correlated business cycles across countries. Since 2005 Puerto Rico, which belongs to the US currency area, has suffered from economic stagnation. This raises the issue of whether currency areas lead to...