But,President Bush's Council of Economic Advisers Chairman Lazear  evaluate the current economy very positive. Lazear said in the “Evening program” of CNN“The elasticity of the U.S. economy is surprising.We have seen again and again the real estate market washit. The price of oil has raised at up to 150 U.S. dollar per Barrels, credit market is tightening.All of these are very difficult to overcome.But our economy has got through. ”the continuous credit crunch will make the following months very difficult because of the rising of unemployment rate.