Codes

This is a 9-digit numeric variable.

Description

IDENT is an identifier created by IPUMS to uniquely identify individual diary days within surveys. Individuals in surveys with multiple diary days will have a different IDENT value for each unique diary day. Within samples where respondents recorded a single diary day, IDENT uniquely identifies these individuals. IDENT is not unique across surveys unless used in combination with SAMPLE.

To uniquely identify only individuals within a survey, users will need to use a combination of HLDID and PERSID in surveys with multiple diary days. HLDID and PERSID are not unique across surveys unless used in combination with SAMPLE.

Comparability

IDENT is comparable across all samples.

Universe

Availability

• Armenia: 2008
• Austria: 1992, 2008
• Belgium: 1966
• Bulgaria: 1965, 2001
• Canada: 2005, 2010, 2015
• Czech Republic: 1965
• Finland: 1979, 2009
• France: 1966, 1985, 2009
• Germany: 1965
• Hungary: 1999, 2009
• Israel: 1991
• Italy: 2002, 2008
• Netherlands: 1975, 1980, 1985, 1990, 1995, 2000
• Peru: 1966
• Serbia: 1965
• South Africa: 2000, 2010
• South Korea: 1999, 2004, 2009
• Spain: 2002
• United Kingdom: 1983, 1987, 1995, 2000, 2005
• United States: 1965, 1975, 1985, 1993, 1995, 1998, 2003-2023