SURVEY OF INCOME AND PROGRAM PARTICIPATION,
     2004 PANEL LONGITUDINAL WEIGHT (WAVES 1-12)
     FILE DATA DICTIONARY

DATA        SIZE  BEGIN

D LGTKEY      8      1
T PE: Person longitudinal key
     The longitudinal key is in sort by 
     scrambled id (SSUID). The first five 
     digits of the key contain a longitudinal 
     sequence number which is unique for the 
     sample unit across all waves.  The last 
     three digits contain a person's index 
     which identifies a person within a sample 
     unit and is unique for a person across all 
     waves.  This key can be used to merge 
     people longitudinally.
V 1001:50000001 .Longitudinal Key

D SPANEL      4      9
T SU: Sample Code - Indicates Panel Year
V       2004 .Panel Year

D SSUID      12     13
T SU: Sample Unit Identifier
     Sample Unit identifier This identifier is 
     created by scrambling together the PSU, 
     Segment, Serial, Serial Suffix of the 
     original sample address.  It may be used 
     in matching sample units from different 
     waves.
V 000000000000:999999999999 .Scrambled Id

D EPPPNUM     4     25
T PE: Person number
     Person number.  This field differentiates 
     persons within the sample unit. Person 
     number is unique within the sample unit.
V   101:1299 .Person number

D LGTPNWT1   10     29
T WW: Longitudinal Panel Weight
V 0.0000:999999.9999 .Weight

D LGTPNWT2   10     39
T WW: Longitudinal Panel Weight
V 0.0000:999999.9999 .Weight

D LGTPNWT3   10     49
T WW: Longitudinal Panel Weight
V 0.0000:999999.9999 .Weight

D LGTPNWT4   10     59
T WW: Longitudinal Panel Weight
V 0.0000:999999.9999 .Weight

D LGTCY1WT   10     69
T WW: Longitudinal First Calendar Year Weight
V 0.0000:999999.9999 .Weight

D LGTCY2WT   10     79
T WW: Longitudinal Second Calendar Year Weight
V 0.0000:999999.9999 .Weight

D LGTCY3WT   10     89
T WW: Longitudinal Third Calendar Year Weight
V 0.0000:999999.9999 .Weight

D LGTCY4WT   10     99
T WW: Longitudinal Fourth Calendar Year Weight
V 0.0000:999999.9999 .Weight