The book aims at creating the foundations for a broad framework of a "theory of mobility in space and time". Starting from a confrontation between mainstream international economics and empirical observation, the approach takes into account the heterogeneity of more or less mobile agents, forms...

Given spatially located observed random variables (x, z = {(xi, zi)}i, we propose a new method for non-parametric estimation of the potential functions of a Markov random field p(x|z), based on a roughness penalty approach. The new estimator maximizes the penalized log-pseudolikelihood function...