Productivity grew at an annual rate of 3.2 percent in the October-December period, down slightly from a 3.6 percent growth rate in the third quarter, the Labor Department reported Thursday. Labor costs fell at a 1.6 percent rate in the fourth quarter after an even bigger 2 percent rate of decline in the third quarter.
For the year, productivity rose a slight 0.6 percent, down from a 1.5 percent increase in 2012, and the weakest performance since an 0.5 percent rise in 2011. Labor costs edged up a slight 1 percent in 2013, continuing a trend of modest gains in labor costs.
Productivity measures output per hour of work. Greater productivity raises living standards because it enables companies to pay their workers more without having to raise prices which could boost inflation.
The Federal Reserve monitors productivity and labor costs for any signs that inflation could pick up. Mild inflation has allowed the Fed to keep short-term interest rates at record lows and purchase bonds to try to keep long-term rates down.
The Fed in December and again in January announced that it was reducing its monthly bond purchases, taking them from $85 billion per month down to $65 billion.
But at the same time, the Fed strengthened its commitment to keep short-term rates low for an extended period. It expects to keep those rates low "well past" the time that unemployment dips below 6.5 percent. The unemployment rate is currently 6.7 percent.
In records going back to 1947, productivity has been growing by about 2 percent per year.
In 2010 and 2011, productivity increased at annual rates above 3 percent. That reflected the fact that millions of Americans were laid off as companies struggled to cope with a deep downturn. While output was down as well, the number of workers fell more, increasing the rate of productivity.
After that initial jump, productivity has slowed in recent years.