关键词：
Labor Economics
Macroeconomics
Part-time Employment
Student Loans
Unemployment
摘要：
This dissertation contributes to the current understanding of labor markets, focusing on the use of micro level data and computational modeling to study the interaction of unemployment with various aspects of the macroeconomy. I address the fact that frictions in the labor market carry over into other dimensions of firms' and workers' decisions, such as a firm's incentive to utilize its current labor force, workers' participation in the labor market, and the decision to acquire or discharge debt. In Chapter 1, I study involuntary part-time employment over the business cycle. I document that the population at work part-time for economic reasons (PTE) is countercyclical, volatile, and transitory. Workers in PTE are nearly three times more likely than the unemployed to return to full-time work in a given month, and seven times more likely than full-time workers to become unemployed. Using household survey data, I demonstrate that cyclical fluctuations in PTE come from changes in the transition rates between full-time and part-time employment rather than between part-time and unemployment. Moreover, these movements are primarily due to within-job changes in hours. Accordingly, I model part-time work focusing on a firm's decision to hire, fire, or partially utilize its labor force. Firms in the model are heterogeneous in size and productivity, and are subject to search frictions. The model produces firm-level utilization of part-time employment which is consistent with observed worker flows, and varies across the size and age distributions of firms. Over the business cycle, the model matches the observed relative volatility of unemployment and PTE. Part-time labor utilization by firms increases the volatility of vacancies and unemployment in the model relative to the case with only an extensive margin. Chapter 2 studies the interaction of a participation margin in a labor market search model. Introducing a participation margin of whether or not to actively search for a j
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