This variable is 2-digit numeric variable.

0 = Only used once or twice or less than one year
96 = Refused
97 = Don't know
98 = No response
99 = Not in universe

Description

ECYEAR indicates the number of years of total E-cigarette use for persons interviewed for the Tobacco Use Supplement (TBRESP) that have ever used E-cigarettes(ECEV), are now either not using it, use it some days, or use it every day(ECFREQ), and self-responded..

This variable is part of the Tobacco Supplement.

Comparability

The universe that IPUMS CPS reports for this variable is based on a review of the original CPS technical documentation. Investigating the data may reveal cases that do not meet the stated universe. Users are encouraged to validate universes for their analyses.

Universe

Flags

Unharmonized Variables