Experimental Design
The study consists of two separately randomized controlled experiments conducted among unemployed youth aged 18–35 in rural Upper Egypt.
Randomization was conducted at the individual level within villages.
The analytical sample contains 11,781 youth across 287 villages in six governorates.
Experiment 1 includes 7,912 participants:
* Control: 2,028
* Youth Only: 1,978
* Youth + Father: 1,973
* Youth + Mother: 1,933
Experiment 2 includes 3,869 participants:
* Control: 1,294
* Youth Only: 1,283
* Youth + Both Parents: 1,292
The two experiments were randomized separately and are analyzed separately. Experiment 1 identifies the effects of father and mother co-presence relative to Youth Only and permits a direct randomized comparison between the Father and Mother arms. Experiment 2 identifies the effect of Both Parents relative to Youth Only. The design does not permit a causal comparison between the Both Parents arm and the Father or Mother arms.
Within each experiment, comparison of Youth Only with Control identifies the effect of receiving tailored job information. Comparison of the parental treatment arm(s) with Youth Only identifies the effect of parental co-presence while holding the information intervention fixed. If this registry field expects short descriptors, I would use:
Unit of randomization: Individual youth, within village.
Randomization: Individual-level randomized assignment, stratified by village.
Number of experiments: Two separately randomized experiments.
Study population: Unemployed youth aged 18–35 who expressed an interest in finding work and were living with both parents at enrollment.
Analytical sample: 11,781 participants.
Geographic coverage: 287 rural villages across six governorates of Upper Egypt: Beni Suef, Fayoum, Minya, Assiut, Sohag, and Qena.
Treatment arms: Seven experiment-specific arms in total: four in Experiment 1 and three in Experiment 2.
Follow-up: Approximately 2 weeks, 4 weeks, and 7–8 weeks after intervention delivery.
Intervention delivery: Individual jobseeker session lasting approximately 20–30 minutes; parental presence varied experimentally.
Primary treatment contrasts: Youth Only vs Control for information provision; Father vs Youth Only and Mother vs Youth Only in Experiment 1; Both Parents vs Youth Only in Experiment 2; Father vs Mother as a direct Experiment 1 contrast.
Inference: Intent-to-treat estimates with village fixed effects and heteroskedasticity-robust standard errors in the final paper.
One important registry point: if this is an existing registration that you are updating rather than creating for the first time, I would preserve the original registered outcomes/design language wherever possible and clearly mark additions as retrospective amendments. Given that the paper explicitly says there was no pre-analysis plan, we should avoid making today’s final-paper outcome hierarchy look prospectively registered if it was not.