WASHINGTON (MarketWatch) - U.S. productivity was revised up to 3.0% increase in the third quarter from an initial read of 1.9%, the Labor Department said Monday. Economists polled by MarketWatch had forecast revised productivity to climb by 2.9%. Output of goods and services was upped to a 4.7% increase from 3.7%, while hours worked was unchanged at a 1.7% rise. Unit-labor costs fell by a sharper 1.4% instead of 0.6% and inflation-adjusted hourly compensation of U.S. workers dropped 1.4%. In the manufacturing sector, productivity was lowered from a 0.4% advance to a 0.1% decline. Over the past year overall U.S. productivity - the key to a rising standard of living - has risen a scant 0.3%.