Forecasting Canadian GDP: Region-Specific versus Countrywide Information
The authors investigate whether the aggregation of region-specific forecasts improves upon the direct forecasting of Canadian GDP growth. The empirical results show that Canadian GDP growth forecasts can be improved by indirectly forecasting the GDP growth of the Canadian economic regions using a multivariate approach.
Link
http://econpapers.repec.org/scripts/redir.pl?u=http%3A%2F%2Fwww.bankofcanada.ca%2Fen%2Fres%2Fwp%2F2005%2Fwp05-31.pdf;h=repec:bca:bocawp:05-31