Reducing Irregular Migration Experiment and Replication Files - Gambia

Abstract
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A cluster-randomized experiment with 3,641 young men from 391 settlements in The Gambia is used to test three approaches to reducing risky migration: providing better information and testimonials about the risks of the journey, facilitating migration to a safer destination by providing information and assistance for migration to Dakar, and offering vocational skill training to enhance domestic employment opportunities. A baseline survey and follow-up survey 18 months later are used.

Geographic coverage
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The Gambia is divided into five administrative regions and the capital city area of Banjul. We selected the two Eastern-most regions of the Upper River Region (URR) with a population of 240,000; and the Central River Region (CRR) with a population of 226,000

Analysis unit
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Migrant, Household

Kind of data
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Sample survey data [ssd]

Sampling procedure
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The Gambia is divided into five administrative regions and the capital city area of Banjul. We selected the two Eastern-most regions of the Upper River Region (URR) with a population of 240,000; and the Central River Region (CRR) with a population of 226,000. These regions were chosen due to their high propensities of irregular migration and poor access to conventional sources of information about migration.

Using estimated population sizes projected from the 2013 Gambian census, we identified settlements that were predicted to have at least 35 males aged between 18 and 30, and that had total population sizes below 3,000. We then used data from the 2015/16 integrated household survey to exclude two districts with the lowest shares of households receiving remittances, to ensure we focused on areas with higher likelihoods of migration. We then randomly selected 404 settlements from a pool of 580 eligible settlements to conduct a listing exercise.

Settlements are divided into enumeration areas (EAs), consisting of at most 500 individuals (50 households), and most settlements consist of only one EA. We randomly chose up to 2 EAs per settlement and conducted a door-to-door listing exercise of all households in these 404 settlements to record whether they have at least one male aged 18 to 30.
Listing took place from March 26, 2019 to April 11, 2019 (see study timeline in Appendix A5) and listed 5,597 households with males aged 18 to 30 in the 404 villages. The baseline survey then took place between April 19, 2019 and May 18, 2019. Data collection was conducted in 391 settlements, after dropping 13 small settlements that had fewer than 4 eligible households. Within the eligible households, the baseline interview took place with a male 18 to 30

Mode of data collection
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Computer Assisted Personal Interview [capi]

Research instrument
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The following survey instruments were used to collecte the data:
- Household Listing
- Baseline Survey
- Youth Endline Survey
- Household Endline Survey
- Elders Endline Survey
- Household Phone Survey

Response rate
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We ended up with a final panel of 3,640 youth which were either interviewed face-to-face (n=2,761) or through the phone (n=475), or for which we got information from their household head (n=370), the elder survey (n=28) or only their WhatsApp location (n=6). Only 1 individual, a teacher, was lost because he could not be contacted by phone and the whole household had moved out.

摘要：本研究采用对冈比亚391个定居点的3,641名年轻男性的集群随机实验，旨在检验三种降低风险性移民的方法：提供关于旅程风险的更好信息和证言、通过提供前往达喀尔的信息和援助以促进迁移至更安全的目的地，以及提供职业技能培训以增强国内就业机会。研究采用了基线调查和18个月后的后续调查。
地理覆盖范围：冈比亚划分为五个行政区域和班珠尔首都地区。我们选择了人口为240,000的上河地区（URR）最东部的两个地区；以及人口为226,000的中河地区（CRR）。
分析单位：移民、家庭。
数据类型：样本调查数据 [ssd]。
抽样程序：冈比亚划分为五个行政区域和班珠尔首都地区。我们选择了人口为240,000的上河地区（URR）最东部的两个地区；以及人口为226,000的中河地区（CRR）。这些地区因其非法移民倾向较高且难以获取有关移民的常规信息而被选中。
利用从2013年冈比亚人口普查中预测的估计人口规模，我们确定了预计至少有35名18至30岁男性且总人口规模低于3,000的定居点。然后，我们使用2015/16年综合家庭调查的数据排除了两个接收汇款家庭比例最低的区，以确保我们关注具有更高移民可能性的地区。然后，我们从580个有资格的定居点中随机选择了404个定居点进行清单作业。
定居点被划分为人口最多为500人的统计区（EA），大多数定居点只包含一个EA。我们随机选择每个定居点最多2个EA，并对这些404个定居点中的所有家庭进行入户清单作业，记录是否至少有一名18至30岁的男性。清单作业于2019年3月26日至4月11日进行（参见附录A5中的研究时间表），记录了404个村庄中5,597个有18至30岁男性的家庭。基线调查于2019年4月19日至5月18日进行。在排除13个少于4个有资格家庭的小定居点后，在391个定居点进行了数据收集。在合格的 household 中，基线访谈是与18至30岁的男性进行的。
数据收集方式：计算机辅助个人访谈 [capi]。
研究工具：用于收集数据的调查工具包括以下内容：
- 家庭清单
- 基线调查
- 青少年终线调查
- 家庭终线调查
- 老龄人终线调查
- 家庭电话调查。
响应率：我们最终得到了3,640名青年的最终样本，他们要么接受了面对面访谈（n=2,761），要么通过电话（n=475）接受访谈，或者我们从他们的户主（n=370）、老年人调查（n=28）或仅从他们的WhatsApp位置（n=6）获取了信息。只有1名个体，一名教师，因无法通过电话联系且整个家庭搬离而丢失。