Do national borders and ethnicity contribute to market segmentation between and within countries? This paper uses unique and high-frequency data on narrowly-defined goods to gauge the extent to which a national border impedes trade between developing countries (Niger and Nigeria). Using a...

"A must read for any development policy maker or practitioner especially if they are thinking about how and where digital technologies can add value and improve the livelihoods of the poor…Most important of all…(they) provide a framework to think about when and how digital is the solution."...