Long-Term Unemployment and the Great Recession: The Role of Composition, Duration Dependence, and Non-Participation. Lawrence Katz, June 2014, Paper. “We explore the extent to which composition, duration dependence, and labor force non-participation can account for the sharp increase in the incidence of long-term unemployment (LTU) during the Great Recession. We Â…first show that compositional shifts in demographics, occupation, industry, region, and the reason for unemployment jointly account for very little of the observed increase in LTU…” Link