· In praise of a second (or third) passport, Multiple identities are natural, citizenship laws should catch up, Jan 7th 2012 (http://www.economist.com/node/21542413)
· Dual citizenship, Dutchmen grounded, Multiple citizenship is on the rise. But some states continue to deter it, Jan 7th 2012 (http://www.economist.com/node/21542394)