An Economic Re-Examination of Current News Articles
Very cool graph
Agreed--it really helps illustrate that much of the volatility in aggregate hours comes not from adjustments in hours/person, but in people working. This, in turn, helps explain why authors like Heckman declare the price elasticity of hours (per person) is nearly zero, but authors like Prescott are correct when they say that aggregate hours are highly variable (and elastic!). Extensive margin is the bigger margin.
Looking at the graph, it appears that the duration of the declines is increasing fairly significantly.