This study extends the MRW model to incorporate a variable for the stock market. The empirical
results demonstrate support for the stock market augmented model. A number of conclusions can
be drawn from the results. One, the stock market is an important variable in determining the longrun growth of the group of countries examined. Two, consistent with the findings of MRW, human
capital is an important determinant of long run economic growth. This variable is significant in
all the regression equations. Three, there is significant evidence of convergence among these
economies. The model for conditional convergence explains about two thirds of the variation
in income compared to MRW (1992) who obtain a R ¯ 2 between 0.38 and 0.46 for the non-oil
and Intermediate samples. Four, evidence points to a positive influence of physical capital on
economic growth and a negative influence of population growth on economic growth.