Survey ID Number
ETH_1995_WMS_v01_M
Title
Welfare Monitoring Survey 1995-1996
Sampling Procedure
The 1995 Welfare Monitoring Survey covered both urban and rural areas of the country, except six zones in Somali Region and two zones in Afar Region . For the purpose of the survey, the country was divided into four categories. Urban areas were divided into two broad categories taking into account sizes of their population. Rural areas were also grouped into two categories.
Category I: Rural parts of eight regions were grouped in this category each of which was the survey domain (reporting level). These regions are Tigray, Afar, Somali, Benishangul-Gumz, Gambela, Harari, Addis Ababa and Dire Dawa.
Category II: In this category thirteen survey domains were defined by grouping contiguous rural parts of the zones or special weredas in Amhara, Oromiya, and SNNP Regions respectively. These were:
a) Amhara
I) North Gonder, South Gonder
II) East Gojam, West Gojam and Agew Awi
III) North Welo and Wag Himra, and
IV) South Welo, Oromiya and North Shoa.
b) Oromiya
I) East Welega, and Welega,
II) Ilubabor and Jimma,
III) North Shoa, West Shoa,
IV) East Shoa, Arsi Bale and Borena, and
V) East and West Hararge.
c) SNNP
I) Keficho-Shekicho, Bench-Maji and yem,
II) North Omo, Derashe and Konso,
III) Grage, Hadia and Kembata-alaba-Timbaro, and
IV) Sidama, Gedio, Amaro and burji.
Other than the 13 domains (reporting levels) defined in Category II, three additional domains have been constructed by combining basic domains from the two rural categories. These domains are:
a) Rural Amhara
b) Rural Oromiya and
c) Rural SNNP
Category III: Ten large urban centers of the country were grouped in this group. Each of the ten urban centers in this category was the survey domain, for which separate survey results for major survey characteristics were reported.
Category IV: Urban centers in the country other than the ten urban centers in category III were grouped in this category and formed a single reporting level.
Other than the eleven domains (reporting levels) defined in Category III and Category IV, one additional domain, namely total urban (country level) can be constructed by combining the basic domains defined in the two categories.
All in all twenty four basic rural domains (reporting levels) including total rural (country level) were defined for the survey.
In addition to the above urban rural domains, survey results are to be reported at regional and country levels by aggregating the survey results for the corresponding urban and rural area.
Definition of the survey domains was based on both technical and resource considerations. More specifically, sample sizes for the domains were determined to enable provision of major indicators with reasonable precision subject to the resources that were available for the survey.
The sample selection scheme and sample size:
a) Category I and Category II: A stratified two-stage sample design was used to select the sample in which the Primary Sampling Units (PSUs) were enumeration areas (EAs). Sample EAs from each domain were selected using systematic probability proportional to size; size being number of households obtained form 1994 population and housing census. A total of 620 EAs were selected from the rural part. Within each sample EA a fresh list of household was prepared at the beginning of the survey's filed work and for the administration of the survey questionnaire 12 households per sample EA were systematically selected. For the 1995 WMS urban centers in the country other than the ten urban centers were grouped in this category. There is one domain in this category, namely; Other Urban Centers. Other than the eleven domains (reporting levels) defined in category I and Category II, one additional domain namely, total urban (country level) can be constructed by combining the basic domains defined in the first two categories.
b) Category III: Stratified two-stage sample design was used to select the sample in which the PSUs were EAs. Sample EAs from each domain were selected using systematic probability proportional to size; size being number of household obtained form the 1994 population and housing census. In this category, a total of 220 EAs were selected. Within each sample EA, fresh list of households was prepared at the beginning of the survey's field work and for the administration of the survey questionnaire 15 households per sample EA were systematically selected.
c) Category IV: Three-stage stratified sample design was adopted to select the sample from domains in category IV. The PSUs were urban centers selected using systematic probability proportional to size; size being number of households obtained form the 1994 population and housing census. The secondary sampling units (SSUs) were EAs which were selected using systematic probability proportion to size; size being number of households obtained form the 1994 population and housing census. Number of sample SSUs selected from each of the the sample urban centers was determined by proportional allocation to their household population from the census. Ultimately, 15 households within each of the sample EAs were selected systematically from a fresh list of households prepared at the beginning of the survey's field work the administration of the survey questionnaire.
Note: Distribution of sample units by domain (reporting levels) is given in Summary Tables A and B of 1995 Welfare Monitoring Survey report.