This dissertation employs the “Task-Approach” to study how tasks impact different facets of the labor market. The first study explores heterogeneity in task costs associated with occupational choice. Exploiting variation in occupational task measures, I construct a measure of task dissimilarity to estimate transition task costs of displaced workers. I find evidence of heterogeneity in task costs across individual task measures. Worker characteristics are also shown to be a source of heterogeneity in the cost estimates. Notably, the types of tasks we generally associate with low, middle, and high-skilled workers performing the most are the dimensions of task costs that are least costly when switching occupations. Furthermore, I find supporti...