Sample characteristics: Nigeria
| Census characteristics | |||||
|---|---|---|---|---|---|
| 2006 | 2007 | 2008 | 2009 | 2010 | |
| Title | General Household Survey | General Household Survey | General Household Survey | General Household Survey | General Household Survey |
| Census agency | National Bureau of Statistics | National Bureau of Statistics | National Bureau of Statistics | National Bureau of Statistics | National Bureau of Statistics |
| Population universe | — | — | — | — | — |
| De jure or de facto | — | — | — | — | — |
| Enumeration unit | Households and persons | Households and persons | Households and persons | Households and persons | Households and persons |
| Census day | — | — | — | — | — |
| Field work period | March 3, 2007 to March 26, 2007 | March 31, 2008 to April 19, 2008 | March 31, 2010 to April 19, 2010 | July 28, 2010 to August 31, 2010 and February to March, 2011 | |
| Enumeration forms | A single form with eleven sections: A) Housing unit identification and conditions, B)Persons present in the household, C) Usual resident absent, D) Contraceptive prevalence, E) Births in the last 12 months, F) National programme on immunization, G) Child nutrition, H) Deaths in the last 12 months, I) Health, J) Householkd enterprises, and K) Household expenditure. | A single form with eleven sections: A) Housing unit identification and conditions, B)Persons present in the household, C) Usual resident absent, D) Contraceptive prevalence, E) Births in the last 12 months, F) National programme on immunization, G) Child nutrition, H) Deaths in the last 12 months, I) Health, J) Householkd enterprises, and K) Household expenditure. | A single form with eleven sections: A) Housing unit identification and conditions, B)Persons present in the household, C) Usual resident absent, D) Contraceptive prevalence, E) Births in the last 12 months, F) National programme on immunization, G) Child nutrition, H) Deaths in the last 12 months, I) Health, J) Householkd enterprises, and K) Household expenditure. | A single form with eleven sections: A) Housing unit identification and conditions, B)Persons present in the household, C) Usual resident absent, D) Contraceptive prevalence, E) Births in the last 12 months, F) National programme on immunization, G) Child nutrition, H) Deaths in the last 12 months, I) Health, J) Householkd enterprises, and K) Household expenditure. | Three questionnaires: household questionnaire, agricultural questionnaire, and community/prices questionnaire. The household questionnaire collected information on size and composition of the household, as well as demographic, migration, education, work, time use, household assets, income, savings, and food consumption and security. The agricultural questionnaire collected information on crop and livestock production, storage, and sales. The community/prices questionnaire collected information on community and prices components. |
| Type of fieldwork | Direct interviews | Direct interviews | Direct interviews | Direct interviews | Direct interviews |
| Respondent | Household head, spouse, or repsonsible adult in the household. | Household head, spouse, or repsonsible adult in the household. | Household head, spouse, or repsonsible adult in the household. | Household head, spouse, or repsonsible adult in the household. | The household head, the household head's spouse, or an eligible adult was the respondent for questions about household assets, income, and food expenses, consumption and security. For questions about individual household members, each person aged 5 and older responded directly to the interviewer (unless age restricitions applied to the question); for children under age 5, a parent or caregiver responded. In cases where a household member was absent during enumeration, the most knowledgeable person in the household responded to questions about the absent member. |
| Coverage | |||||
| Microdata sample characteristics | |||||
|---|---|---|---|---|---|
| 2006 | 2007 | 2008 | 2009 | 2010 | |
| Microdata source | National Bureau of Statistics | National Bureau of Statistics | National Bureau of Statistics | National Bureau of Statistics | National Bureau of Statistics |
| Sample design | The sample followed a two-stage, replicated and rotable design in which enumeration areas (EAs) demarcated for the 1991 Population Census served as the primary sampling units and housing units (HUs) as the secondary sampling units. Sixty EAs per state and 30 EAs in the Federal Capital Territory, Abuja were randomly selected. In each EA, 10 households were selected randomly from a list of all households in the EA. In total, 21,900 housing units from 2,190 enumeration areas were included in the sample. The selected EAs were distributed across urban and rural areas. | The sample followed a two-stage, replicated and rotable design in which enumeration areas (EAs) demarcated for the 1991 Population Census served as the primary sampling units and housing units (HUs) as the secondary sampling units. Sixty EAs per state were randomly selected. In each EA, 10 households were selected randomly from a list of all households in the EA. In total, 18,355 housing units from 2,204 enumeration areas interviewed included in the sample. The selected EAs were distributed across urban and rural areas. |
The sample followed a two-stage, replicated and rotable design in which enumeration areas (EAs) demarcated for the 1991 Population Census served as the primary sampling units and households as the secondary sampling units. Thirty EAs per state were randomly selected. In each EA, 15 households were selected randomly from a list of all households in the EA. In total, 450 hhs where selected for interview per state. Total, 16650 households from 1,110 EAs were selected for interview. The selected EAs were distributed across urban and rural areas. |
The sample followed a two-stage design in which enumeration areas (EAs) served as the primary sampling units and households as the secondary sampling units. A total of 500 EAs were selected based on probability proportional to size (PPS) of the total EAs in each state and the total households listed in those EAs. In each EA, 10 households were selected randomly from a list of all households in the EA. In total, 4,851 households and 29,993 individuals were interviewed in 500 EAs. | |
| Sample unit | Enumeration area and housing unit | Enumeration area and housing unit | Housing unit | Enumeration area and household | Enumeration area and household |
| Sample fraction | 0.1% | 0.1% | 0.1% | 0.1% | 0.1% |
| Sample size (person records) | 83,700 | 85,183 | 107,425 | 77,896 | 72,191 |
| Sample weights | Weights computed by statistical agency should be used for most types of analysis. | Weights computed by statistical agency should be used for most types of analysis. | Weights computed by statistical agency should be used for most types of analysis. | Weights computed by statistical agency should be used for most types of analysis. | |
| Units identified | |||||
|---|---|---|---|---|---|
| 2006 | 2007 | 2008 | 2009 | 2010 | |
| Dwellings | No | No | No | No | No |
| Vacant units | No | No | No | No | No |
| Households | Yes | Yes | Yes | Yes | Yes |
| Individuals | Yes | Yes | Yes | Yes | Yes |
| Group quarters | No | No | No | No | No |
| Special populations | No | No | No | No | No |
| Smallest geography | State | State | State | State | State |
| Unit definitions | |||||
|---|---|---|---|---|---|
| 2006 | 2007 | 2008 | 2009 | 2010 | |
| Housing Units | Any building or structure with an entrance. It may be occupied by persons, be vacant, or uncompleted. | Any building or structure with an entrance. It may be occupied by persons, be vacant, or uncompleted. | Any building or structure with an entrance. It may be occupied by persons, be vacant, or uncompleted. | Any building or structure with an entrance. It may be occupied by persons, be vacant, or uncompleted. | All types of structures occupied by members of the household. I may consist of a room(s) inside a house, a group of houses, a multi-storeyed house, or a hut or group of huts. |
| Households | A household consists of a person or a group of persons living together under the same roof or in the same building/compound, who eat from the same pot and recognize themselves as a unit. | A household consists of a person or a group of persons living together under the same roof or in the same building/compound, who eat from the same pot and recognize themselves as a unit. | A household consists of a person or a group of persons living together under the same roof or in the same building/compound, who eat from the same pot and recognize themselves as a unit. | A household consists of a person or a group of persons living together under the same roof or in the same building/compound, who eat from the same pot and recognize themselves as a unit. | A household is a group of people who normally live in the same household unit, who are or are not related to one another, and and who eat from the same pot. |
| Group quarters | A housing unit occupied largely by persons not related by blood. Examples include school hostels where children from different parents live during the school session, hotels where travelers and holidaymakers or people on business stay for a short period of time. Institutional housing units usually contain more rooms than residential buildings. | A housing unit occupied largely by persons not related by blood. Examples include school hostels where children from different parents live during the school session, hotels where travelers and holidaymakers or people on business stay for a short period of time. Institutional housing units usually contain more rooms than residential buildings. | A housing unit occupied largely by persons not related by blood. Examples include school hostels where children from different parents live during the school session, hotels where travelers and holidaymakers or people on business stay for a short period of time. Institutional housing units usually contain more rooms than residential buildings. | A housing unit occupied largely by persons not related by blood. Examples include school hostels where children from different parents live during the school session, hotels where travelers and holidaymakers or people on business stay for a short period of time. Institutional housing units usually contain more rooms than residential buildings. | --- |
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