Two data sources: 1. Small Area Income and Poverty Estimates (SAIPE) Program 2. NHGIS-Census, American Community Survey
- Small Area Income and Poverty Estimates (SAIPE) Program (link: https://www.census.gov/programs-surveys/saipe/data/datasets.html)
- Data cover: 1989, 1993, 1995-2021
- Geographic unit: state/county/school district