Version 02 Codebook
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CODEBOOK VARIABLE DOCUMENTATION
1948-2000 CUMULATIVE DATA FILE
(1948.WT00)




                   NES 1948-2000 CUMULATIVE DATA FILE
                          VARIABLE DOCUMENTATION



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NOTES ON VARIABLE NAMING:

1.
The variable name references used in NES Study codebooks do not include
the "V" prefix found in all variable names used within the released
SAS and SPSS data definition files (.sas and .sps files).

For example, "VAR CF0001" and "VAR VERSION" in Study codebooks refer to
variables VCF0001 and VVERSION in the study data definition files.

2.
Variable numbers listed for years prior to 1996 are not always listed
according to the newest NES numbering scheme, which affixes 2-digit year
of study to the start of a 4-digit variable number.  For example, in the
list of source variables for Cumulative Data File variable CF0126 (VCF0126)
below, "1952:  141" refers to V520141 from the 1952 time-series dataset.


SPECIAL NOTE ON COLUMN LOCATIONS:

Some numeric variables use coding schemes that allow for code values
having a varying number of digits. In such instances, the number
of columns corresponding to the variable in the data file [.dat file]
and in the column specifications  will be the width of the maximum value
occurring in the actual data, rather than the maximum width allowable
by the coding scheme.  For example, if codes 01-12 are allowed for a
numeric variable but all values in the data are less than 10, then the
width of the variable will be output as 1.



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