The Labor Department's rate of labor underutilization is 14.8% of thepotential workforce, much higher than the 8.1% unemployment rate. Which means that a lot of workers are not able to make the fullest use of their skills. If unemployment stays high for a very long period some workers lose their skills and become less employable. THat could leave the floor for unemployment at amuch higher level. Something like this is happening now and stay with us as the unemployment rate grows and the underutilization of labor rate with it. Physiscists call it "hysteresis"., a kind of laggard impact of some sustained force. An example is if you squeeze a nerf ball for so long that it doesn't bounce back when you release it. Higher underutilization of labor which could hit 20% by 2010 at the rate at which job losses are ocurring of half a million a month, would mean pressure on wages and fears of deflation, lower tax revenues and fears of persistent deficits, less cash to invest and companies having less capital to invest leading to lower earnings. And falling behind the curve is what Krugman fears could be happening now, even with the large stimulus and budget of the new President, because of a series of problems ocurring at the same time and reinforcing each other. And the efforts of the government still not large or effective to meet the scale of the challenge. See the link to this. ...