INFO file:  MIGRATE.DAT

This is SAA migration data 1970, 1980, 1990.
The data is contained in one file combined as follows:

Variable:  FIPS           5 digit county FIPS code

Description: 1970 migration data
Source:      Gross Migration by County: 1965-1970, US Dept. of Commerce,
               Bureau of the Census Current Population Reports,
               Series P-25 #701, May 1977  (hardcopy)
Units:       Persons (absolute)
Variables:
   TNET7     : net county migration (TIN7 minus TOUT7)
   TIN7      : total in-migration for county
   TOUT7     : total out-migration for county
   TWNET7    : net county white (race) migration (TWIN7 minus TWOUT7)
   TWIN7     : total white (race) in-migration for county
   TWOUT7    : total white (race) out-migration for county
   TBNET7    : net county black (race) migration (TBIN7 minus TBOUT7)
   TBIN7     : total black in-migration for county
   TBOUT7    : total black out-migration for county

Description: 1980 migration data
Source:      Gross Migration for Counties: 1975-1980, Census of
               Population 1980, US Dept. of Commerce, Bureau of
               the Census, PC80-S1-17, March 1984  (hardcopy)
Units:       Persons (absolute)
Variables:
   TNET8     : net county migration (TIN8 minus TOUT8)
   TIN8      : total in-migration for county
   TOUT8     : total out-migration for county
   TWNET8    : net county white (race) migration (TWIN8 minus TWOUT8)
   TWIN8     : total white (race) in-migration for county
   TWOUT8    : total white (race) out-migration for county
   TBNET8    : net county black (race) migration (TBIN8 minus TBOUT8)
   TBIN8     : total black in-migration for county
   TBOUT8    : total black out-migration for county

Description: 1990 migration data
Source:      County-to-County Migration Flow Files, 1990 Census
                of Population and Housing, Special Project 312  (CDROM)
Units:       Persons (absolute)
Variables:
   TNET9     : net county migration (TIN9 minus TOUT9)
   TIN9      : total in-migration for county
   TOUT9     : total out-migration for county
   TWNET9    : net county white (race) migration (TWIN9 minus TWOUT9)
   TWIN9     : total white (race) in-migration for county
   TWOUT9    : total white (race) out-migration for county
   TBNET9    : net county black (race) migration (TBIN9 minus TBOUT9)
   TBIN9     : total black in-migration for county
   TBOUT9    : total black out-migration for county