This paper introduces a new model for spatial time series in which cross-sectional dependence varies nonlinearly over space by means of smooth transitions. We refer to our model as the Smooth Transition Spatial Autoregressive (ST-SAR). We establish consistency and asymptotic Gaussianity for the...

This paper studies how the strength of social ties are affected by the geographical location of other individuals and their social capital. We characterize the equilibrium in terms of both social interactions and social capital. We show that lower travel costs increase not only the interaction...

Technology is a key element for long-term growth and economic development. Given the stark concentration of innovation activities in a few countries most countries have to rely on the international diffusion of newly developed technologies. Some countries may fail to successfully perform the...

Transformation to post-industrial or knowledge-based economies causes changes in the structure of labour markets with growing demand on highly-qualified workforce. In XXI century human capital has become one of the most important production factors determining competitiveness and innovativeness...