WASHINGTON — U.S. nonfarm productivity fell 2.0% in the fourth quarter of 2012, as output growth slowed dramatically and hours worked growth was stronger than in the previous quarter, data released by the Bureau of Labor Statistics Thursday showed.

As a result of the sharp drop in productivity growth and a solid increase in compensation, unit labor costs rose 4.5% after a downward revised 2.3% decline in the previous quarter. Analysts in an MNI survey had expected unit labor costs to rise 3.3%.

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