This paper characterizes economically optimal investments into Africa's road network in partial and general equilibrium - based on a detailed topography of the network, road construction costs, frictions in cross-border trading, and economic geography. Drawing from data on 144 million...

This paper analyses the impact that Spanish road construction had on local population growth between 1787 and 1857. We find that the increase in market access associated to road accessibility had a substantial effect on local population growth. The impact was substantially higher on the...