1. Nice and intuitive graph by Brookings on the trade networks within the US. It looks a great deal like the Salop circle that has been widely used in the IO literature. These location models are so fascinating that I’ll have to devote a separate post to them!
2. New paper by Erica Field and coauthors on peer effects in business training. Here is a summary of the paper by the World Bank Development Blog. There is striking evidence that when women go to short-term business training with a friend, they are more likely to take out a loan and deliver better business results. The exact mechanism remains to be explained.
3. Liran Einav and Jonathan Levin review the use of big data in economics.