Existing methods of reconstructing historical Euro-zone data by aggregation of the individual countries' aggregate data raises numerous difficulties, especially due to past exchange rate changes. The approach proposed here is designed to avoid such distortions, and aggregate exactly when...

The open-economy Solow-Swan growth model predicts (1) that growth should be uncorrelated with the ratio of national investment to GDP and (2) instantaneous convergence of GDP per capita across countries. In the presence of capital market imperfections convergence is predicted to occur more...