The economy in the U.S. expanded less than previously estimated in the third quarter, reflecting a drop in inventories that points to a pickup in growth as 2011 comes to a close.

Gross domestic product climbed at a 2 percent annual rate from July through September, less than projected and down from a 2.5 percent prior estimate, revised Commerce Department figures showed today in Washington. The median forecast of 81 economists surveyed by Bloomberg News called for no revision. Excluding stockpiles, so-called final sales climbed 3.6 percent, the most since last year's fourth quarter.

Gains in retail sales, manufacturing and housing this quarter, combined with lean inventories, raise the odds the world's largest economy will pick up. At the same time, unemployment and stagnant wages mean consumer spending has been fueled by reductions in savings that cast doubt on whether increases will be sustained into 2012, just as the risks from government cutbacks and the European debt crisis intensify.