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...

This note implements a novel approach to formalizing spatial externalities by employing spatial econometric methods that combine spatial dependence in the form of spatial autoregressive processes and spatial heterogeneity in the form of spatial regimes. The results confirm earlier findings that...