1.   As more information becomes available to government economists, the department will revise its numbers and report them later this month and in late June.

2.   But recently, the federal agency revised that number to only two, he said.

3.   But Michael Mussa, the IMF chief economist, recently said that he would not be surprised if the agency revises that number downward in a few months.

4.   DES revises its number because it relies on two different measuring techniques.

5.   He and other analysts are now scrambling to revise the numbers, expecting to lower forecasts even more.

6.   Initially, officials in Baghdad said four men had commandeered the plane, but after securing the release of the passengers they revised the number to two.

7.   Pentagon officials said as many as nine Americans were killed, but later revised the number to eight.

8.   Private economists expect that number to be revised to somewhere near zero on Wednesday.

9.   The January number was revised upward.

10.   The second caveat is that the government is always revising its numbers, which can yield big changes in our view of the past.