What is the impact of modern transportation technology on long-run economic change in poor countries with high trade costs?  Rail construction in colonial Sub-Saharan Africa provides a natural experiment: 90% of African rail-road lines were built before independence, in a context where...

Increasingly, development projects list social capital development and network brokerage among their objectives.  How do we quantitatively evaluate such initiatives?  Best practice, diff-in-diff methods may be impossible or too costly.  Here, we try using data that are byproducts of the...