This paper explores the relationship between knowledge creation, entrepreneur-ship, and economic growth in the United States over the last 150 years. Accor-ding to the “new growth theory,” investments in knowledge and human capital ge-nerate economic growth via spillovers of knowledge. But the...

Modeling the spatial aspect of growth has finally become an important subject of economics as exemplified by the increasing popularity of the new economic geography. However, new economic geography models have still not been able to develop a consistent approach to integrate innovation, space...