Diffusion of knowledge-based activities is represented by a dynamic model based on potentialized partial differential equations. Spatial econometric estimation of the model is achieved through applications to empirical data for France and USA.
COUTROT, B., PAELINCK, J.H.P., SALLEZ, A. et SUTTER, R. (2009). On Potentialized Partial Finite Difference Equations: Analysing the Complexity of Knowledge-based Spatial Economics Developments. Région et Développement, 29, pp. 237-264.