NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH
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A Method to Construct Geographical Crosswalks with an Application to US Counties since 1790

Fabian Eckert, Andrés Gvirtz, Jack Liang, Michael Peters

NBER Working Paper No. 26770
Issued in February 2020

---- Acknowledgments ----

Corresponding email address: mail@fpeckert.me. A repository with the county crosswalks for every decade since 1790, the county map files and replication code, and a general Python code to create crosswalks given any reporting and reference maps can be found at https://www.fpeckert.me/eglp. We are grateful to Henry Glick from the Yale StatLab for help with ArcGIS and to Dave van Riper from the Minnesota Population Center for numerous discussions about the details of historical geographical delineations in the Census data. We also thank David Autor, Rebecca Jackson, Stephen Redding, and Esteban Rossi-Hansberg for early comments and encouragement. Gvirtz thanks the German National Academic Foundation and the Economic and Social Research Council for generous financial support. The views expressed herein are those of the authors and do not necessarily reflect the views of the National Bureau of Economic Research.

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