CAT has a good sense of worldwide economic growth and in today’s earnings report the equipment manufacturer said conditions are weaker than expected.

It anticipates “slightly better world growth in 2013,” with modest improvement in the U.S., China “and most of the developing world but continuing difficulty in Europe.”

On CNBC, Caterpillar’s CEO had some upbeat comments on China.

“We sure see China past the bottom. I’m optimistic about China in 2013.”