Links I liked 13Jul2011 1. Everything you ever wanted to know about noise-cancelling devices 2. xkcd on Strunk & White 3. Instructive approach to aid in Somaliland. But replicable on a larger scale? 4. Did Charles Kenny just call Dambisa Moyo ridiculous in the Guardian? 5. Do national institutions explain cross-border differences in an ethnic group’s economic performance?