2024-03-28T22:25:30
150101
Thu Mar 28 22:25:31 EDT 2024
New Area- and Population-based Geographic Crosswalks for U.S. Counties and Congressional Districts, 1790-2020
Andreas Ferrara
Patrick A. Testa
Liyang Zhou
150101
https://doi.org/10.3886/E150101V1
A common problem in applied research involves harmonizing geographic units across time or different levels of aggregation. We provide crosswalks that allow researchers i) to harmonize U.S. county boundaries over time across Census decades and ii) to generate congressional district level variables from county-level data. The crosswalks include an area-based approach as in Hornbeck (2010), as well as the new population-based methods from Ferrara, Testa, and Zhou (2021), which are based on granular sub-county population information. We also provide teaching material to demonstrate the utility of these new crosswalks.
USA
1790 – 2020
geographic information system (GIS) data