Sharp Drop in Unemployment Due to People Leaving the Labor Force: The headline unemployment rate fell sharply to 6.7 percent in December. However, this is not good news. The drop was almost entirely due to people leaving the labor force as the number of people reported employed in December only rose by 143,000, just enough to keep the employment-to-population ratio constant.
Blacks disproportionately left the labor market, with the labor force participation rate for African Americans dropping by 0.3 percentage points to 60.2 percent, the lowest rate since December of 1977. The rate for African American men fell 0.7 percentage points to 65.6 percent, the lowest on record.
The data on the establishment side was not any brighter with the survey reporting an increase of just 74,000 jobs. Some of this weakness was due to unusually slow growth in health care and restaurant employment. This is likely an anomaly that will be reversed in future months. However, there was also a decline in the index of average weekly hours. This suggests that the economy may be weaker than some of the more recent optimistic accounts indicated.
More detail here.