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Registration

Field Before After
Last Published October 27, 2025 09:20 AM November 24, 2025 09:06 AM
Planned Number of Clusters Sample size (clusters): 2000 groups Sample size (clusters): 1600 groups
Planned Number of Observations Sample size (observations): 4000 individuals Sample size (observations): 3200 individuals
Sample size (or number of clusters) by treatment arms Sample size by treatment arms: 1000 individuals (500 groups) in each treatment; intended sample size of 250 Black worker groups and 250 white worker groups in each treatment. Note that these are the pre-exclusion criteria sample sizes. Sample size by treatment arms: 800 individuals (400 groups) in each treatment; intended sample size of 200 Black worker groups and 200 white worker groups in each treatment. Note that the total sample size reflects the number of "completes." The survey is considered incomplete if any of the following occur: - They drop out at any point during the study. - They fail an attention check. - They time out of the survey. - They fail the CAPTCHA on the first page. - They are not matched with a partner. - Their partner drops out. A participant is considered a complete if and only if they finish the entire survey and reach the final page where they submit the completion code.
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