National Household Budget Survey 2007
Tanzania, 2007
Get MicrodataIdentification
TZA-NBS-HBS-2007-v01
National Household Budget Survey 2007
| Name | Country code |
|---|---|
| TANZANIA | TZA |
Income/Expenditure/Household Survey [hh/ies]
This report presents the findings of the 2007 Tanzania Household Budget Survey (HBS), which covered Mainland Tanzania. The analysis focuses on poverty-relevant indicators, including those defined in the Government’s five year programme for economic and social development; the National Strategy for Growth and Reduction of Poverty (NSGRP), commonly referred to by its Kiswahili acronym, MKUKUTA.
The HBS collected information on a range of individual and household characteristics. These included
• Household members’ education, economic activities, and health status
• Household expenditure, consumption and income
• Ownership of consumer goods and assets
• Housing structure and materials
• Distance to services and facilities
• Food security.
Sample survey data [ssd]
Individual and Household
Version
Version 1.0
Scope
The Scope of Household Budget Survey is; Identification Particulars, Household Particulars, Household Facilities, Housing Particulars, Distances to Socio-Economic Facilities, Purchase of Durable Items and other Services, Household Assets, Food Security, Annual Household Income, Daily Consumption Expenditure
| Topic | Vocabulary | URI |
|---|---|---|
| ECONOMICS [1] | CESSDA | http://www.nesstar.org/rdf/common |
Coverage
TANZANIA MAINLAND
CLUSTERS
The survey covered all de jure household members
Producers and sponsors
| Name | Affiliation |
|---|---|
| NATIONAL BUREAU OF STATISTICS | MINISTRY OF STATE PRESIDENT,S OFFICE PLANNING AND PRIVATISATION |
| Name | Role |
|---|---|
| CENSUS AND SURVEY TECHNICAL WORKING GROUP | TECHNICAL ASSISTANCE |
| MR.PATRICK WARD | TECHNICAL ASSISTANCE |
| MS.TUDY OWENS | TECHNICAL ASSISTANCE |
| MS. ELLEONORA FICHERA | TECHNICAL ASSISTANCE |
| EMILIAN KARUGENDO | TECHNICAL ASSISTANCE |
| AHMED MAKBEL | TECHNICAL ASSISTANCE |
| SWISS DEVELOPMENT COOPERATION | TECHNICAL ASSISTANCE |
| Name | Role |
|---|---|
| SWISS DEVELOPMENT COOPERATION | FINANCIAL ASSISTANCE |
| CENSUS AND SURVEY WORKING GROUP | FINANCIAL ASSISTANCE |
| MKUKUTA | FINANCIAL ASSISTANCE |
| Name | Affiliation | Role |
|---|---|---|
| ALDEGUNDA KOMBA | NBS | TECHNICAL ASSISTANCE |
| IRENIUS RUYOBYA | NBS | TECHNICAL ASSISTANCE |
| GREGORY MILLINGA | NBS | TECHNICAL ASSISTANCE |
| ELIDE MWANRI | NBS | TECHNICAL ASSISTANCE |
| STEPHEN. G .COSMAS | NBS | TECHNICAL ASSISTANCE |
| STEPHEN MAGANDA | NBS | TECHNICAL ASSISTANCE |
| SANGO SIMBA | NBS | TECHNICAL ASSISTANCE |
| FRED MATOLA | NBS | TECHNICAL ASSISTANCE |
| GABRIEL SIMBILA | NBS | TECHNICAL ASSISTANCE |
Sampling
The sample was based on a revised national master sample that has been developed out of the 2002 Census information. For the 2007 HBS, the national master sample provided the primary sampling units (PSUs) for the national urban and rural sample. It was supplemented with additional PSUs to provide a regional sample for Dar es Salaam, so that the survey provides estimates for Dar es Salaam region, other urban areas and rural areas.
Primary sampling units were selected using probability proportional to size, with the number of household recorded in the Census preparatory estimates being the measures of size. A comprehensive household listing was undertaken in each of the sampled clusters. Information on a number of durable assets was collected for each household during the listing exercise.
This information was used to stratify households within each cluster into high, middle and low income households. Separate proportional samples were then drawn from each of these categories. The sample selection was done in the head office and each regional supervisor was supplied with their respective list of pre-selected households.
In total, the analysis includes 10,466 households and 447 of the intended 448 clusters. This is over 97 percent of the original intended sample size of 10,752 households. However, of the households included in the analysis, 13 percent were interviewed as reserve (replacement) households after the originally selected ones could not be found, a similar proportion to 2000/01. Replacements were particularly high in Dar es Salaam, where they constituted almost 19 percent of the sample analysed. Replacement is not usually considered a good practice because of the risk of introducing bias into the sample. This was minimised in the survey because households used as replacements had similar characteristics to those being replaced, although its frequency in Dar es Salaam raises concerns
Table 1.1 shows the resulting sample sizes in each of the analytical areas and compares them
to the previous HBS.
Table 1.1 Number of Primary Sampling Units and Households included in the analysis (HBS 2000/01 and HBS 2007)
2000/01 2007
DSM
Other
Urban Rural Total DSM
Other
Urban Rural Total
Number of clusters 57 566 535 1,158 152 158 137 447
Number of
households 1,225 13,384 7,569 22,178 3,456 3,737 3,273 10,466
Analytical weights were defined as the inverse of each household’s selection probability, taking
into account the selection of the primary sampling units and stratification within each PSU. The
weights were adjusted so that the sum of individuals by area was equal to its projected
population for 2007. In some cases this adjustment was quite large, raising concerns about the
listing process. Details of the sampling process and weights are given in Appendix A1.
The 2007 HBS has some 75 percent of the population in rural areas, compared with 80
percent in the 2000/01 HBS. This fall in the proportion rural will be driven by urban growth and
by the re-classification of areas as urban. The latter may be substantial because the 2000/01
HBS used a sample frame based on the 1988 census. One result is that indicators for the
population as a whole may be observed to improve between surveys even when there is little
apparent change within each area, simply because the overall population is more urban. Dar
es Salaam constitutes 7.5 percent of the 2007 sample and around 6 percent of the 2000/01
sample. These issues are discussed in more detail in Appendix A1
Survey instrument
The questionnaires contain information related to;Household Particulars, Household Facilities, Household Assets, Household Income, Distance to socio-Economic Facilities, Purchase of Durable items and other Services,Food security;
Data collection
| Start | End |
|---|---|
| 2007-01 | 2007-12 |
| Start date | End date |
|---|---|
| 2007-01 | 2007-12 |
- Face-to-face [f2f]
| Name | Affiliation |
|---|---|
| NATIONAL BUREAU OF STATISTICS | MINISTRY OF STATE PRESIDENT,S OFFICE PLANNING AND PRIVATISATION |
The most recent round of the National Bureau of Statistic’s household budget surveys was undertaken in 2007. It followed similar surveys in 2000/01 and 1991/92. Preparations for the 2007 HBS began in July 2006 and field staff were trained in December of that year. Data collection began on the 1st of January 2007 in all 21 regions of Mainland Tanzania. The field work continued for 12 months and was complete by December 31st 2007.Field work supervision was mainly done by NBS staff in regional offices. Regional supervisors collected and checked completed questionnaires before sending them to the head office in Dar es Salaam for data entry. They also observed a sample of interviews.
The most recent round of the National Bureau of Statistic’s household budget surveys was undertaken in 2007. It followed similar surveys in 2000/01 and 1991/92. Preparations for the 2007 HBS began in July 2006 and field staff were trained in December of that year. Data collection began on the 1st of January 2007 in all 21 regions of Mainland Tanzania. The field work continued for 12 months and was complete by December 31st 2007.
The sample was smaller than the 2000/01 HBS. This is because the 2000/01 HBS provided separate estimates for each of the regions of Mainland Tanzania, whereas the 2007 survey was not intended to provide that level of disaggregation. The 2007 HBS had an intended sample of 448 clusters (villages or census enumeration areas) and 10,752 households.
The fieldwork was conducted in the same way as the 2000/01 HBS. Two households in each cluster were enumerated in each calendar month. Therefore, over the course of the survey, 24 households were to be interviewed per cluster. Enumerators, who were residents in or near the cluster, conducted an initial interview with the two households at the beginning of the survey month. They then visited households on a regular basis during that month for the purpose of recording households’ daily transactions, covering expenditure, consumption and income.
These visits were scheduled to be daily for the households without any literate member and every two to three days for others. Field work supervision was mainly done by NBS staff in regional offices. Regional supervisors collected and checked completed questionnaires before sending them to the head office in Dar es Salaam for data entry. They also observed a sample of interviews.
The data entry, using CSPro, went on in parallel with field work and was completed in March 2008. Data consistency checks were developed to identify any inconsistencies in the entered data and errors were corrected by referring to the original questionnaire. Data cleaning continued until July 2008 and the analysis was completed by mid-November 2008.
Data processing
Data consistency checks were developed to identify any inconsistencies in the entered data and errors were corrected by referring to the original questionnaire. Data cleaning continued until July 2008 and the analysis was completed by mid-November 2008.
Data appraisal
In order to ease readability of the tables in this report, the sample size on which the estimates are based is not stated. However, estimates are based on more than 150 observations, unless indicated; usually they are based on many more. Sampling errors and confidence intervals are presented for some key variables in Appendix A1.
Data Access
| Name | Affiliation | URL | |
|---|---|---|---|
| NATIONAL BUREAU OF STATISTICS | MINISTRY OF STATE PRESIDENT,S OFFICE PLANNING AND PRIVATISATION | www.nbs.go.tz | dg@nbs.go.tz |
| Is signing of a confidentiality declaration required? | Confidentiality declaration text |
|---|---|
| yes | Confidentiality of respodents is guaranteed by section 20 of Tanzania Statistics act number 1 of 2002 Before being granted access to the dataset, all users have formally agree: 1.all identifying information such as the name and address of respondent has been removed; and 2.the information is disclosed in a manner that is not likely to enable the identification of the particular person or undertaking or business to which it relates. 3.not attempt to identify any particular person or undertaking or business; 4.use of information for research or statistically purpose only; 5.not to disclose the information to any other person, organization 6.when required by the Director General, return all documents made available to him to the Director General; 7.comply with the directions given by the Director General relating to the records. 8.every person involved in the research or statistical project for which information is disclosed pursuant to this section shall make the declaration of secrecy set out in the first schedule. |
Tanzania NBS considered three levels of accessibility:
- Public use files, accessible by all
- Licensed datasets, accessible under certain conditions
- Datasets only accessible on location, for certain datasets
The dataset has been anonymized and available as a public use dataset. It accessible to all for statistical and research purposes only, under the following terms and conditions:
1.The data and other material will not be redistributed or sold to other individuals, institutions, or organization without the written agreement of the National Bureau of Statistics.
2.The data will be used for statistical and scientific research purposes only. They will be used solely for reporting of aggregated information, and not for investigation of specific individuals or organizations.
3.No attempt will be made to produce links among dataset provided by the National Bureau of Statistics, or among data from the (National Bureau of Statistics) and other datasets that could identify individuals or organizations
4.No attempt will be made to re-identify respondents, and no use will be made of the identify of any person or establishment discovered inadvertently. Any such discovery would immediately be reported to the National Bureau of Statistics.
5.Any books, articles, conference papers, theses, dissertations, reports, or other publications that employ data obtained from the National Bureau of Statistics will cite the source of data in accordance with the Citation Requirement provided with each dataset.
"NATIONAL BUREAU OF STATISTICS, HOUSEHOLD BUDGET SURVEY 2007 (HBS 2007) VERSION 1.0 OF THE PUBLIC USE DATASET(MAY 2009) PROVIDED BY NATIONAL BUREAU OF STATISTICS, www.nbs.go.tz"
Disclaimer and copyrights
The user of the data acknowledges that National Bureau of Statistics is the origional collector of thedata.the authorized distributor of the data.and the relevant funding agency bear no responsibility for use of the data or for interpretations or inferences without a written agreement from the National Bureau of statistics.
@ 2010 NATIONAL BUREAU OF STATISTICS
Contacts
| Name | Affiliation | URL | |
|---|---|---|---|
| Director General | National Bureau of Statistics | dg@nbs.go.tz | www.nbs.go.tz |
Metadata production
TZA-NBS-HBS-2007-v01
| Name | Affiliation | Role |
|---|---|---|
| NATIONAL BUREAU OF STATISTICS | MINISTRY OF STATE PRESIDENT,S OFFICE PLANNING AND PRIVATISATION | DATA PRODUCER |
| Accelerated Data Program | PARIS21 | Review of the metadata |
Metadata version
Version 1.0