Introduction -- An overview of the literature -- Models without diffusion -- Technology, diffusion, and growth: a key trinomial -- Models with exogenous diffusion -- Models with endogenous diffusion -- An alternative approach: the advantages of continuous-time quantitative methods -- Econometric...

The design of a stratified sample from a finite population deals with two main issues: the definition of a rule to partition the population, and the allocation of sampling units in the selected strata. This article examines a tree-based strategy which plans to solve jointly these issues when the...

This article addresses an issue that is debated in the economics of innovation literature, namely the existence of increasing returns toR&Dexpenditures and firm size, in productinnovation. It explores further how the firm’s structural characteristics and contextual factors affect the sustained...

Existing indices measuring the spatial distribution of economic activity such as the Krugman Specialisation Index, the Hirschmann-Herfindahl index and the Ellison-Glaeser index typically do not take into account the spatial structure of the data. In this paper, we first consider traditional...

This article provides an empirical assessment of the growth experiences of European regions, during the period 1991-2004, by taking into account the spatial effects due to both institutions and geography. These effects have been modelled by means of specific controls and by using a...

We study the effects of aggregation on four different cases of nonlinear spatial gravity models. We present some theoretical results on the relationship between the mean flows at an aggregated level and the mean flow at the disaggregated level. We then focus on the case of perfect aggregation...