A Panel Study of Income Dynamics:
               1968-1980 Retrospective Occupation-Industry
                           Files Documentation
                                    
                               (Release 1)
                                    
                                    
The set of 1968-1980 Retrospective Occupation-Industry Files is
comprised of thirteen family-level files, one for each wave,
containing three-digit 1970 Census occupation and industry codes
for selected PSID Heads and Wives.

These files are designed to be linked to the relevant 1968 through
1980 Family Files, and family identifiers are compatible with those 
datasets.

Records on these files are short and contain only five variables
per file:  the yearly Interview Number and two sets of occupation
and industry codes.  The first set (e.g., on the 1968 file,
HDIND68 and HDOCC68) are the three-digit industry and occupation
for the Head in that wave.  The second set (e.g., on the 1968 
file, WFIND68 and WFOCC68) are the three-digit industry and 
occupation for the Wife, if there was one. 

The 1968-1980 Retrospective Occupation-Industry Files contain
varying numbers of records, depending on the number of families
with either a Head or a Wife who met the recoding criteria. 
Hence, not every Head or Wife in a given wave was recoded.  The 
documentation (OCCIND.TXT) provides more details on qualifications 
for recoding.

Each of the thirteen waves has three files-a raw data file,
a file of SAS statements, and a file of SPSS statements.

    FILE ATTRIBUTES FOR DATA FILES

                                       NUMBER OF
    FILENAME       RECORDS    LRECL    VARIABLES 
    OCCIND68.DAT    4802        16         5     
    OCCIND69.DAT    3596        16         5
    OCCIND70.DAT    3870        16         5
    OCCIND71.DAT    3976        16         5
    OCCIND72.DAT    4070        16         5
    OCCIND73.DAT    4177        16         5
    OCCIND74.DAT    4345        16         5
    OCCIND75.DAT    4435        16         5
    OCCIND76.DAT    4485        16         5
    OCCIND77.DAT    4595        16         5
    OCCIND78.DAT    4712        16         5
    OCCIND79.DAT    4939        16         5
    OCCIND80.DAT    5148        16         5

Each file is sorted, in ascending order, by the yearly Interview
Number (e.g., for the 1968 file, ID68; for the 1969 file, ID69,
etc.).

In addition to input specifications, the SAS and SPSS program
statement files contain label and missing data statements.

    PROGRAM STATEMENT FILES FOR SAS

    OCCIND68.SAS      
    OCCIND69.SAS      
    OCCIND70.SAS      
    OCCIND71.SAS 
    OCCIND72.SAS      
    OCCIND73.SAS      
    OCCIND74.SAS      
    OCCIND75.SAS      
    OCCIND76.SAS      
    OCCIND77.SAS     
    OCCIND78.SAS      
    OCCIND79.SAS      
    OCCIND80.SAS

    PROGRAM STATEMENT FILES FOR SPSS

    OCCIND68.SPS      
    OCCIND69.SPS      
    OCCIND70.SPS      
    OCCIND71.SPS 
    OCCIND72.SPS      
    OCCIND73.SPS      
    OCCIND74.SPS      
    OCCIND75.SPS      
    OCCIND76.SPS      
    OCCIND77.SPS     
    OCCIND78.SPS      
    OCCIND79.SPS      
    OCCIND80.SPS