The historical analysis of US regional growth is improved by augmenting existing estimates of state personal income per capita, extending previous studies of convergence across states, and more broadly, offering an improved basis for interpreting other issues in regional development such as the...

Long memory in the volatility of individual return series and in the volatility of equal-weighted portfolios constituted by the individual return series is analyzed to see if the memory characteristic of the volatility representation is correlated with the portfolio characteristics of size,...