“…A growing recent literature has emphasized the importance of different subcategories of persons within the three labor market states for individual and aggregate outcomes. These include heterogeneity among the unemployed that accounts for the duration distribution of unemployment (van den Berg and van Ours, 1996;Hornstein, 2012;Ahn and Hamilton, 2020a; The Dual U.S. Labor Market Uncovered Ahn, Hobijn, and Şahin Kroft et al, 2016;Mueller and Spinnewijn, 2023), heterogeneity in the type of jobs for the employed to account for the tenure distribution (Hall, 1982;Hyatt and Spletzer, 2016) as well as worker turnover (Pries, 2004;Pries and Rogerson, 2021), and heterogeneity among different categories of non-participants and unemployed to account for fluctuations in matching efficiency (Hall and Schulhofer-Wohl, 2018;Sedláček, 2016;Abraham et al, 2020). All these studies have the common implication that a more accurate description of individual-level labor market histories as well as macro-level labor market dynamics requires the identification and measurement of broad subcategories of the three coarse labor market states.…”