This paper proposes a simple method measuring spatial robustness of estimated coefficients and considers the role of administrative districts and regions' size. The procedure, dubbed "Grid and Shake", offers a solution for a practical empirical issue, when one compares a variables of interest...

This paper explores how the interaction between firm heterogeneity, urban costs and transport costs determines spatial configuration across regions within a simple general-equilibrium model. We spot light on how firm heterogeneity affects the centrifugal and centripetal forces and reshapes the...