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Table 4 Percentages of addresses geocoded to 1990 census and then assigned to a 1960, 1970, and 1980 census tract, the LC-SES study, 2001–2002. 1Jackson, MS & Washington Co., MD print files of U.S. Bureau of the Census housing data for 1960 [34]. 2Includes some addresses sent to vendor but not assigned a latitude and longitude.

From: Historical measures of social context in life course studies: retrospective linkage of addresses to decennial censuses

  % of All Addresses
Street addresses for 1960 (N = 8200)  
Sent to geocoding vendor 89
   Vendor assigned latitude and longitude 61
1960 tract assigned using overlay/comparability file 26
1960 Assigned area by overlay (non tract area)1 16
1970 tract Assigned (non tract area-1960) 16
   1960 tract Assigned manually2 8
Total addresses assigned tract 66
Street addresses for 1970 (N = 12671)  
Sent to geocoding vendor 93
   Vendor assigned latitude and longitude 71
1970 tract assigned using overlay 69
   1970 tract assigned manually2 7
Total addresses assigned tract 76
Street addresses for 1980 (N = 3277)  
Sent to geocoding vendor 94
   Vendor assigned latitude and longitude 81
1970 tract assigned using overlay 80
   1970 tract assigned manually2 5
Total addresses assigned tract 85