STRATA is a 12-digit numeric variable.

Description

This variable is the strata identifier for the sample. The STRATA variable provides information about the sample design that can be used to improve estimation.

Comparability — General

In most samples, the STRATA variable captures implicit geographic stratification and is created by assigning a unique identifier to groups of between 10 and 19 adjacent households within low level. This method of strata creation is used for samples drawn by IPUMS International or by others using a systematic sampling method across geographically sorted records. The variable is constructed in a similar way for all samples listed as systematic samples and for which sufficiently low level geographic identifiers were available. The size of geographic areas within which the strata are created vary by country and sometimes by sample within country. Additional documentation is available on the Variance Estimation page.

Some samples provided by countries were drawn using other complex sample design methods. For countries that provided a strata variable with the source data, it is incorporated here.

STRATA is not available for several samples. STRATA are not created for samples when geographic identifiers or other stratification information is missing or lacks sufficient detail to create strata identifiers.

Universe

Availability

• Argentina: 1980, 1991, 2001, 2010
• Armenia: 2001, 2011
• Austria: 1971, 1981, 1991, 2001, 2011
• Bangladesh: 1991, 2001, 2011
• Benin: 1979, 1992, 2002, 2013
• Bolivia: 1976, 1992, 2001
• Botswana: 1981, 1991, 2001
• Brazil: 1970, 1980, 1991, 2000, 2010
• Burkina Faso: 1985, 1996, 2006
• Cambodia: 1998, 2004, 2008, 2013
• Cameroon: 1976, 1987, 2005
• China: 1982, 1990
• Colombia: 1964, 1973, 1985, 1993, 2005
• Costa Rica: 1963, 1973, 1984, 2000
• Cuba: 2002
• Dominican Republic: 1960, 1970, 2002, 2010
• Ecuador: 1974, 1982, 1990, 2001, 2010
• Egypt: 1996, 2006
• Ethiopia: 1984, 1994, 2007
• Fiji: 2014
• Ghana: 1984, 2000, 2010
• Greece: 1971, 1981, 1991, 2001
• Guinea: 1983, 1996
• Haiti: 1982, 2003
• Honduras: 1961, 1974, 1988, 2001, 2013
• India: 1983, 1987, 1993, 1999, 2004
• Indonesia: 1971, 1976, 1980, 1985, 1990, 1995, 2000, 2005, 2010
• Iran: 2006, 2011
• Iraq: 1997
• Israel: 1972, 1983, 1995
• Italy: 2001
• Jamaica: 1982, 1991, 2001
• Jordan: 2004
• Kenya: 1979, 1989, 1999, 2009, 2019
• Kyrgyzstan: 1999
• Liberia: 1974, 2008
• Malawi: 1987, 1998, 2008
• Malaysia: 1970, 1980, 1991, 2000
• Mali: 1998, 2009
• Mongolia: 2000, 2020
• Morocco: 2004
• Mozambique: 1997, 2007
• Nepal: 2001
• Nicaragua: 2005
• Pakistan: 1973, 1981, 1998
• Palestine: 1997, 2007
• Panama: 1960, 1970, 1980, 1990, 2000, 2010
• Papua New Guinea: 1980, 1990, 2000
• Philippines: 1990, 1995, 2000, 2003Q3, 2003Q4, 2004Q1, 2004Q2, 2004Q3, 2004Q4, 2005Q1, 2005Q2, 2005Q3, 2005Q4, 2007Q1, 2007Q2, 2007Q3, 2007Q4, 2008Q1, 2008Q2, 2008Q3, 2008Q4, 2009Q1, 2009Q2, 2009Q3, 2009Q4, 2010, 2010Q1, 2010Q2, 2010Q3, 2010Q4, 2011Q1, 2011Q2, 2011Q3, 2011Q4, 2012Q1, 2012Q2, 2012Q3, 2012Q4, 2013Q1, 2013Q2, 2013Q3, 2013Q4, 2014Q1, 2014Q2, 2014Q3, 2014Q4, 2015Q1, 2015Q2, 2015Q3, 2015Q4, 2016Q1
• Poland: 1978
• Romania: 1977, 1992, 2002, 2011
• Rwanda: 1991, 2002, 2012
• Saint Lucia: 1991
• Senegal: 2002
• Sierra Leone: 2004
• South Africa: 1996, 2001, 2007, 2011
• South Sudan: 2008
• Spain: 1991, 2001, 2011
• Switzerland: 1970, 1980, 1990, 2000
• Tanzania: 1988, 2002, 2012
• Thailand: 1970, 2000
• Togo: 1960, 1970, 2010
• Trinidad and Tobago: 1970, 1980, 1990, 2000, 2011
• Turkey: 1985, 1990, 2000
• Uganda: 1991, 2002
• Ukraine: 2001
• United States: 2000
• Uruguay: 2006
• Venezuela: 1971
• Vietnam: 1989, 1999, 2009
• Zambia: 1990, 2000, 2010
• Zimbabwe: 2012