This paper provides a simplified method of exploring the geographical limits of a knowledge shock over the long run. Using a geographically decomposable distanceweighed sum of world GDPs by county, differences in differences regression analysis shows that a new university will not only have a...

The effect of social capital on economic growth is examined using linear regression analysis and U.S. county-level data. Results reveal that social capital has a statistically significant, independent positive effect on the rate of per-capita income growth.