A significant number of employees within the United States identify themselves as selfemployed, and they are distinct from the larger group identified as private jobholders. While socioeconomic and spatial information on these individuals is readily available in standard datasets, such as the...

A significant number of employees within the United States can be considered "informal" or "off-the-books" workers. These workers, who by definition do not appear in administrative wage records, are distinct from the larger group of private jobholders who do appear in administrative records....

Individuals who hold multiple jobs have complex working lives and complex commuting patterns. Economic and spatial information on these individuals is not readily available in standard datasets, such as the 2000 Decennial Census Long Form, because the survey questions were not designed to...