* Matthew Rognile is blogging again. Here he is on the liquidity trap and finding effective targets for stabilizing economic activity.

* Laurence Kotlikoff has followed up his Purple Health Plan with a Purple Tax Plan.

* Ross Douthat has written a wonderful column on the death of Bin Laden. And I have it on good authority that he wrote in about the time it takes for me to watch an episode of Martin Lawrence’s 1990s sitcom Martin.

* David Frum and Conrad Black have written worthwhile posts on today’s Canadian election and the death of separatism.

* Michael Pettis explains why Americans no longer derive a net benefit from the reserve currency status of the dollar.

* Richard Cornuelle was an impressive, generous, and very smart man. He’ll be missed.

* Tim Lee elaborates on the potential of software innovation to deliver productivity gains in the “real economy.”