We develop a tractable dynamic model of productivity growth and technology spillovers that is consistent with the … emergence of real world empirical productivity distributions. Firms can improve productivity by engaging in in-house R\&D, or …-growth equilibrium featuring persistent productivity differences even when starting from ex-ante identical firms. The long …

refocus the debate and analyses the economic issues, impacts and implications of the innovation clusters policy. To do this … cooperation. We assume that innovation cluster "potentiates", by a synergistic action, the beneficial effect of each of these …