For a long time, the urbanization and development discourse has coincided with a focus on economic growth and big cities. Yet, much of the world's new urbanization is taking place in smaller urban entities (towns), and the composition of urbanization may well bear on the speed of poverty...

This paper develops the concept of "action space" as the range of possible destinations to which a migrant can realistically move at a given point in time and, intimately linked to this, the set of possible livelihoods at destination. It shows how this space expands and contracts over time...