Download LTDB Files  
Please note: The program code and crosswalk files may be updated based on comments and suggestions from users.It would be wise to check for updates before finalizing analyses based on the LTDB.
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The reference for technical documentation is Logan, John R., Zengwang Xu, and Brian Stults. 2014. "Interpolating US Decennial Census Tract Data from as Early as 1970 to 2010: A Longitudinal Tract Database" The Professional Geographer 66(3): 412–420.(Click here to download).

©Spatial Structures in Social Sciences, Brown University