AEA RCT Registry

Field	Before	After
Trial Status	in_development	completed
Trial End Date	November 28, 2019	February 06, 2020
Last Published	November 12, 2019 11:25 AM	February 10, 2020 10:35 AM
Intervention End Date	November 28, 2019	February 06, 2020
Planned Number of Clusters	324 students (planned for wave 1)	360 students
Planned Number of Observations	108 groups	120 groups
Sample size (or number of clusters) by treatment arms	18 groups control, 18 groups treatment 1, 54 groups treatment 2, 18 groups treatment 3	20 groups control, 20 groups treatment 1, 60 groups treatment 2, 20 groups treatment 3
Power calculation: Minimum Detectable Effect Size for Main Outcomes	n.a. (due to unknown effect sizes) However, since 18 observations on the group level per treatment seem relatively few, we are prepared to conduct a second wave. At this stage it is not feasible to conduct more sessions at once, since we challenge the laboratory capacity if we invite more than 324 students in one wave.	n.a. (due to unknown effect sizes) However, since 20 observations on the group level per treatment seem relatively few, we are prepared to conduct further waves. At this stage it is not feasible to conduct more sessions at once, since we challenge the laboratory capacity if we invite more than 360 students in one wave.
Did you obtain IRB approval for this study?	No	Yes

Field	Before	After
IRB Name		German Association for Experimental Economic Research e.V.
IRB Approval Date		December 10, 2019
IRB Approval Number		N9eJFdRK

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