Somali High Frequency Survey - December 2017, Wave 2 - Somalia

Abstract
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In December 2017, the World Bank, in collaboration with Somali statistical authorities conducted the second wave of the Somali High Frequency Survey to monitor welfare and perceptions of citizens in all accessible areas of 17 regions within Somalia’s pre-war borders including Somaliland which self-declared independence in 1991. The survey interviewed 4,011 urban households, 1,106 rural households, 468 households in Internally Displaced People (IDP) settlements and 507 nomadic households. The sample was drawn randomly based on a multi-level clustered design. This dataset contains information on economic conditions, education, employment, access to services, security, perceptions and details before displacement for displaced households. It also includes comprehensive information on assets and consumption, to allow estimation of poverty based on the Rapid Consumption methodology as detailed in Pape and Mistiaen (2014).

Geographic coverage
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The following pre-war regions: Awdal, Bakool, Banadir, Bari, Bay, Galgaduug, Gedo, Hiran, Lower Juba, Mudug, Nugaal, Sanaag, Middle and lower Shabelle, Sool, Togdheer and Woqooyi Galbeed (Somaliland self-declared independence in 1991).

Analysis unit
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Household

Kind of data
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Sample survey data [ssd]

Sampling procedure
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Wave 2 of the SHFS employed a multi-stage stratified random sample, ensuring a sample representative of all subpopulations of interest. Strata were defined along two dimensions - administrative location (pre-war regions and emerging states) and population type (urban areas, rural settlements, IDP settlements, and nomadic population). Households were clustered into enumeration areas (EAs), with 12 interviews was expected for each selected EA. Primary sampling units (PSUs) were generated using a variety of techniques depending on the population type. The primary sampling unit (PSU) in urban as well as rural strata was the enumeration area (EA). For IDP strata, primary sampling units were IDP settlements as defined by UNCHR’s Shelter Cluster. Across all strata, PSUs were selected using a systematic random sampling approach with selection probability proportional to size (PPS). In IDP strata, PPS sampling is applied at the IDP settlement level. In second- and final-stage sample selection, a microlisting approach was used, such that EAs were divided into 12 smaller enumeration blocks, which were selected with equal probability. Every block was selected as 12 interviews per EA were required. A similar second-stage sampling strategy was employed for IDP strata. Each IDP settlement was segmented manually into enumeration blocks. Finally, one household per block was interviewed in all selected blocks within the enumeration area.The household was selected randomly with equal probability in two stages, following the micro-listing protocol. The strategy for sampling nomadic households relied on lists of water points. The list of water points was divided up by stratum at the federated member state level and they served as primary sampling units. Water points were selected in the first stage with equal probability, with 12 interviews to be conducted at each selected water point. The selection of nomadic households to interview relied on a listing process at each water point whose aim was to compile an exhaustive list of all nomadic households at the water point. For more details, see accompanying documents, available under the related materials tab.

Sampling deviation
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EAs were replaced if security rendered field work unfeasible. Replacements were approved by the project manager. Replacement of households were approved by the supervisor after a total of three unsuccessful visits of the household.

Mode of data collection
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Computer Assisted Personal Interview [capi]

Research instrument
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The household questionnaire is in English. It includes the following modules:
- Introduction
- Module A: Administrative Information
- Module B: Interview Information and Filters
- Module C: Household Roster
- Module D: Household Characteristics
- Module E: Food Consumption
- Module F: Non-Food Consumption
- Module G: Livestock
- Module H: Durable Goods
- Module I: Perceptions and Social Services
- Module J: Displacement
- Module K: Fishing
- Module L: Catastrophic Events and Disasters
- Module M: Enumerator Conclusions
- Appendix A - Enabling Conditions
- Appendix B - Validation Conditions and Messages
- Appendix C - Instructions
- Appendix D - Options
- Appendix E - Variables
- Appendix F - Option Filters

The household questionnaire is provided under the Related Materials tab.

摘要
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2017年12月，世界银行与索马里统计当局合作，对索马里境内的17个战前地区的所有可访问区域，包括1991年宣布独立的索马里兰，进行了第二次索马里高频调查，以监测公民的福利和感知。该调查对4,011户城市家庭、1,106户农村家庭、468户国内流离失所者家庭和507户游牧家庭进行了访谈。样本基于多级聚类设计随机抽取。本数据集包含关于经济状况、教育、就业、服务可及性、安全、感知以及流离失所前详细情况的信息。同时，还包括了关于资产和消费的全面信息，以便根据Pape和Mistiaen（2014年）中详细阐述的快速消费方法来估算贫困水平。
地理覆盖范围
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以下战前地区：阿瓦尔、巴科尔、班迪尔、巴尔、巴伊、加尔加杜格、盖多、希兰、下朱巴、穆杜格、努加尔、桑阿格、中下谢贝利、索尔、托格德赫尔和沃库约伊加尔比德（索马里兰于1991年宣布独立）。
分析单元
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家庭
数据类型
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样本调查数据 [ssd]
抽样程序
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SHFS的第二波调查采用了多阶段分层随机抽样，确保样本能够代表所有感兴趣的子群体。分层基于两个维度——行政位置（战前地区和新兴国家）以及人口类型（城市地区、农村定居点、国内流离失所者定居点和游牧人口）。家庭被聚类为统计区域（EA），每个选定EA预期进行12次访谈。根据人口类型，使用多种技术生成初级抽样单位（PSU）。在城市和农村分层中，初级抽样单位（PSU）是统计区域（EA）。对于国内流离失所者分层，初级抽样单位是国内流离失所者定居点，由联合国难民署的庇护集群定义。在所有分层中，PSU使用与规模成比例的概率抽样（PPS）方法进行选择。在国内流离失所者分层中，PPS抽样在流离失所者定居点级别进行。在第二阶段和最终阶段样本选择中，使用了微列表方法，将EA划分为12个更小的统计区域，这些区域以相等的概率被选中。每个区域都选为每个EA需要12次访谈。对于国内流离失所者分层，采用了类似的第二阶段抽样策略。每个国内流离失所者定居点被手动划分为统计区域。最后，在所有选定的统计区域内，每个区域只访谈一个家庭。家庭的选取在两个阶段中均以相等的概率随机进行，遵循微列表协议。游牧家庭抽样的策略依赖于水点列表。水点列表在联邦成员州级别按分层划分，并作为初级抽样单位。在第一阶段，以相等的概率选择水点，每个选定水点进行12次访谈。游牧家庭访谈的选择依赖于在每个水点进行的列表过程，其目的是编制所有游牧家庭在water point的详尽清单。有关更详细信息，请参阅相关文档，可在相关材料标签下找到。
抽样偏差
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如果安全状况导致现场工作不可行，则替换EA。替换由项目经理批准。在三次总失败访问后，由主管批准家庭替换。
数据收集方式
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计算机辅助个人访谈 [capi]
研究工具
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家庭问卷使用英语编写。它包括以下模块：
- 引言
- 模块A：行政信息
- 模块B：访谈信息和过滤器
- 模块C：家庭花名册
- 模块D：家庭特征
- 模块E：食物消费
- 模块F：非食物消费
- 模块G：牲畜
- 模块H：耐用消费品
- 模块I：感知和社会服务
- 模块J：流离失所
- 模块K：捕鱼
- 模块L：灾难性事件和灾害
- 模块M：调查员结论
- 附录A - 促进条件
- 附录B - 验证条件和信息
- 附录C - 指令
- 附录D - 选项
- 附录E - 变量
- 附录F - 选项过滤器
家庭问卷可在相关材料标签下提供。