1.   ...doubts about the sustainability of the current economic expansion.

2.   Although the current expansion has surpassed the average length of postwar recoveries, it has been weak by historical standards, and income gains have been anemic.

3.   At least the current economic expansion eases the pinch by increasing revenues and taking some of the load off safety-net programs.

4.   At the same time, Stern said, several other factors could limit the current expansion.

5.   Beginning in March the current expansion will enter its seventh year, and few economists say they see signs of imbalance that could lead to a downturn.

6.   Beginning in March the current expansion will enter its seventh year.

7.   Blinder also said the current expansion could be destroyed by too much of a good thing.

8.   Blinder listed a few incidents that could bring the current expansion to its knees.

9.   Bonds, which tend to do relatively well when the economy turns sour, responded to Wall Street worries about the future of the current expansion.

10.   After five years, the current expansion is now stumbling through its slowdown.