This paper reconsiders the evolution of the growth of American cities since 1790 in light of new theories of urban growth. Our null hypothesis for long-term growth is random growth. We obtain evidence supporting random growth against the alternative of mean reversion (convergence) in city sizes...

We develop a model of a city populated by heterogeneous agents. Agents self-select into entrepreneurship, and entrepreneurs set up firms which hire workers. We characterize the equilibrium matching between firms and workers, as well as the within-city assignment of agents to locations. We then...

Using micro-level data coming from household surveys over 5 years, from 2013 to 2017, we analyse what are the determinants of mobile broadband adoption in developing economies. We provide empirical evidence on the presence of a learning effect stemming from mobile money use, which by providing a...