IMF-induced austerity, and that the economy may be unable to sustain growth above 6%.

ECONOMIST: India

Without it, certainly, Germany will be unable to sustain its new role as the economic and foreign-policy powerhouse of Europe.

ECONOMIST: Schr?der��s struggle

The Republican Party is dying and will be unable to sustain itself over the long run in its current form.

FORBES: The Grand Old Republican Party Is Over

"The U.S. is still unable to sustain what used to be just average rates of growth, " said Paul Ashworth, chief U.S. economist at Capital Economics.

WSJ: Economy Adds 88,000 Jobs