Is America Facing an Increase in Structural Unemployment, and If So, What Should be Done About It?

The Economist asks:

Is America facing an increase in structural unemployment, and if so, what should be done about it?

My response is here (I talked mainly about the second half of the question). There are also responses from Daron Acemoglu, Scott Sumner, Richard Koo, Paul Seabright, Gilles Saint-Paul, and David Laibson, with more to come. [All Responses]