RT info:eu-repo/semantics/article T1 The spatial diffusion of innovations and the evolution of regional disparities T2 La difusión espacial de la innovación y la evolución de las disparidades regionales A1 Fratesi, Ugo K1 Spatial innovation diffusion K1 Regional disparities K1 Technological spillovers K1 ICTs K1 Innovación K1 Difusión K1 Disparidades regionales K1 Spillovers tecnológicos K1 TICs K1 Economía K1 Economics K1 Geografía K1 Geography K1 Sociología K1 Sociology AB This paper investigates the concurrent effects on regional disparities of the speeds of innovation and of the spatial diffusion of knowledge. The aim is to investigate whether an increase in the pace of innovation, identical in all regions, due to exogenous factors such as the «technological revolution» or policies targeting the «innovative effort» of territories, can give rise to increased disparities. In order to answer these questions, the paper focuses on the role of interregionally shared knowledge and shows that, due to the cumulativeness of knowledge, making the same innovativeeffort is not enough to maintain the same income "per capita". Moreover, the speed of innovation is not the only determinant, because a role of equal importance is played by the ease of interregional knowledge diffusion. To support this argument,first a new simple static model is built to extend symmetrically existing north-south models of trade and to rigorously represent the actual producers of goods whose production technique is shared between regions. Then, building on the first model, two reduced forms for the dynamics of innovation and diffusion flows are introduced - one probabilistically, the other with multiple equilibria. These lead to the same conclusion: an increase in the pace of innovation, even with structurally identical regions, may generate regional income disparities if knowledge is cumulative and spilloversare essentially local. It is finally shown, however, that the divergence effect of increased innovation pace can be counterbalanced by an increase in the speed of spatial knowledge diffusion. PB Asociación Española de Ciencia Regional (AECR) SN 2340-2717 YR 2007 FD 2007 LK http://hdl.handle.net/10017/30388 UL http://hdl.handle.net/10017/30388 LA spa DS MINDS@UW RD 28-nov-2023