VCF0103 Respondent Cohort

QUESTION:
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1964-1976:  What is your date of birth?
1978-1982:  What is the month and year of your birth?
1984-LATER: What is the month, day and year of your birth?

VALID_CODES:
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1.  1975 - Present
2.  1959 - 1974
3.  1943 - 1958
4.  1927 - 1942
5.  1911 - 1926
6.  1895 - 1910
7.  Before 1895

MISSING_CODES:
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0.  NA; DK; RF; no Pre IW
Inap. question not used

NOTES:
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GENERAL NOTE:
Built from VCF0101 (except 1954) or from birth year when available.
See notes VCF0101.
1948 NOTE:
The 1948 ANES age variable was present as age groups which do not allow 
simple recoding.  An estimate was made to fit those codes into the 
cohort categories.  The original age categories were:
   1948:  1.18-24; 2.25-34; 3.35-44; 4.45-54; 5.55-64; 6.65 and over.
The 1948 recode used was:  1=4, 2=5, 3-4=6, 5-6=7.
1954 NOTE:
The 1954 ANES age variable was present as age groups which do not allow 
simple recoding.  An estimate was made to fit those codes into the 
cohort categories.  The original age categories were:
   1954:  1.21-24; 2.25-34; 3.35-44; 4.45-54; 5.55-64; 6.over 65.
The 1954 recode used was:  1=4, 2-3=5, 4-5=6, 6=7.

WEIGHT:
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VCF0009/VCF0009a

TYPE:
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Numeric  Dec 0

SOURCE_VARS:
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1948:  480047  
1952:  520142
1954:  540025  
1956:  560295  
1958:  580174  
1960:  600122
1962:  620009  
1964:  640187
1966:  660192  
1968:  680533  
1970:  700398(type 0) 
1972:  720294
1974:  742406  
1976:  763369  
1978:  780504  
1980:  800408 
1982:  820535  
1984:  840429
1986:  860595  
1988:  880417  
1990:  900552  
1992:  923903
1994:  941203  
1996:  960605
1998:  980572  
2000:  000908  
2002:  023126x
2004:  043249a