We present a selective review of migration and its connection with the economy, focusing on issues leading towards a modelling perspective.We introduce a class of models based on difference equations on directed graphs that may provide a quantitative and qualitative description of human...

We couple a spatially homogeneous energy balance climate model with an economic growth model which incorporates two potential policies against climate change: mitigation, which is the traditional policy, and geoengineering. We analyze the optimal policy mix of geoengineering and mitigation in...

The increasing scarcity of water resources (in terms of quantity and quality) is one of the most pervasive natural resource allocation issues facing development planners throughout the world.This problem is especially prevalent in less developed countries where the management of this valuable...

The increasing scarcity of water resources (in terms of quantity and quality) is one of the most pervasive natural resource allocation issues facing development planners throughout the world.This problem is especially prevalent in less developed countries where the management of this valuable...

We introduce spatial spillovers as an externality in the production function of competitive firms operating within a finite spatial domain under adjustment costs. Spillovers attenuate with distance and the overall externality could contain positive and negative components with the overall effect...

We explain the spatial concentration of economic activity, in a model of economic geography, when the cost of environmental policy - which is increasing in the concentration of pollution - and an immobile production factor act as centrifugal forces, while positive knowledge spillovers and...

We explain the spatial concentration of economic activity, in a model of economic geography, when the cost of environmental policy - which is increasing in the concentration of pollution - and an immobile production factor act as centrifugal forces, while positive knowledge spillovers and...

We explain the spatial concentration of economic activity, in a model of economic geography, when the cost of environmental policy - which is increasing in the concentration of pollution - and an immobile production factor act as centrifugal forces, while positive knowledge spillovers and...

We explain the spatial concentration of economic activity, in a model of economic geography, when the cost of environmental policy - which is increasing in the concentration of pollution - acts as a centrifugal force, while positive knowledge spillovers and a site with natural cost advantage act...