Measuring International Mobility Through Where People Log In to Commonly Used Websites
International mobility of people is measured much less accurately than that of goods or finances. The most common sources of global data are from national censuses, which occur only every 10 years (and take years more to come out). Specialized surveys in some countries allow more frequent measurement of some flows, but such data are still relatively rare, and poorly suited to studying short-term migration movements.


Over and over again, and then again, and then some more, we get asked about evidence for the role of public opinion for development. Where's the impact? How do we know that the public really plays a role? What's the evidence, and is the effect size significant? Go turn on the television. Go open your newspaper. Go to any news website. Do tell me how we're supposed to put that in numbers.