From the NY Fed:
The first figure shows how these three labor market variables evolved over the four post-1973 business cycles (excluding the short 1980 cycle), along with developments in the Great Recession and current recovery. We start at the lowest level of the unemployment rate before the recession and then follow the changes for three years after the rate reaches its maximum level. For the current expansion, the maximum unemployment rate occurred in October 2009.
The employment-to-population ratio displays a classic V-shape recession and recovery pattern in the 1970s and 1980s. In the recession and recovery of the early 1990s, however, the employment-to-population ratio instead displays a U shape, only returning to its pre-recession level three years after the peak in the unemployment rate. In the recession and recovery of the early 2000s, neither the participation rate nor the employment-to-population ratio returns to its previous level, so we see an incomplete U-shape pattern.
In the most recent cycle, the employment-to-population ratio traces out an L shape, but the unemployment rate falls because the participation rate declines substantially (a much more gradual decline was expected by many given the aging of the baby boomers); in other words, a larger share of the population is out of the labor force rather than participating and being unemployed.
Good thing the Obama White House pivoted to healthcare reform after passing the stimulus. It’s work was done.