Local job growth is an important policy objective. Urban economics literature tells that access to a large pool of labor (labor pooling) leads to local economic concentrations through agglomeration economies.  However, these concentrations may be self-limiting because they reduce labor availability through competition over high-skill workers.   Using Atlanta metropolitan area as an example, my research examines whether labor pooling and labor availability of workers with different human capital (measured by income category) account for local job growth. My analysis finds that the availability of high-income workers is the only positive significant factor for job growth, and the spatial scale of the effect is larger than the neighborhood scale.