Skin Color and Secondary Education in Ghana

Last registered on June 23, 2025

Pre-Trial

Trial Information

General Information

Title
Skin Color and Secondary Education in Ghana
RCT ID
AEARCTR-0015760
Initial registration date
June 19, 2025

Initial registration date is when the trial was registered.

It corresponds to when the registration was submitted to the Registry to be reviewed for publication.

First published
June 23, 2025, 12:02 PM EDT

First published corresponds to when the trial was first made public on the Registry after being reviewed.

Locations

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Primary Investigator

Affiliation
Princeton University

Other Primary Investigator(s)

PI Affiliation
University of Chicago
PI Affiliation
Princeton University
PI Affiliation
Harvard University
PI Affiliation
MIT

Additional Trial Information

Status
In development
Start date
2008-08-01
End date
2026-12-31
Secondary IDs
Prior work
This trial is based on or builds upon one or more prior RCTs.
Abstract
This study proposes to assess the heterogeneous effects of free secondary education in Ghana by skin color, and to document potential pathways through which skin color interferes. We build on an existing RCT study led by Duflo, Dupas, and Kremer (“Measuring the returns to secondary education,” registered in the AEA RCT Registry under ID AEARCTR-015).
External Link(s)

Registration Citation

Citation
Adukia, Anjali et al. 2025. "Skin Color and Secondary Education in Ghana." AEA RCT Registry. June 23. https://doi.org/10.1257/rct.15760-1.0
Experimental Details

Interventions

Intervention(s)
Scholarships for 4-year of secondary school were randomly awarded to 682 students among 2,064 Ghanaian youths who had been admitted into Senior High School as of Fall 2008, but had not enrolled by January 2009. Scholarships were paid directly to the schools and covered the entire tuition fees and other school costs (e.g., exam fees).
Intervention Start Date
2009-01-01
Intervention End Date
2012-07-01

Primary Outcomes

Primary Outcomes (end points)
We will test for heterogeneity in impacts of scholarships by skin color, on the following outcomes:
Educational outcomes: score on achievement test (2013); highest education grade completed;
Family formation outcomes: partner’s characteristics; age at first pregnancy;
Labor market outcomes: employment; earnings.
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
To investigate mechanisms, we will test for heterogeneity in impacts of scholarships by skin color, on the following outcomes:
- Attitudes and preferences: aspirations, willingness to express opinions, extroversion, conformism, expectations of returns from education;
- Parental and teacher investment
- Self-efficacy
Secondary Outcomes (explanation)
Components of Parental and Teacher Investment Indices:
1) When I was in school, I could count on my teachers to help out when I had a problem;
2) When I was in school, my teachers thought that I was capable of doing the work;
3) I worried about getting picked on or teased at school;
4) I felt that kids treated me kindly at school or in social situations;
5) My parent/guardian was involved in my schooling when I was a child;
6) My parent/guardian criticized me or my ideas when I was a child;
7) My parent/guardian trusted my judgement when I was a child.

Self-efficacy Index:
1) I can solve difficult problems if I try hard enough;
2) I feel that I am a person of worth, at least on an equal level with others;
3) I can deal efficiently with unexpected events;
4) I have little control over the things that happen to me.

Experimental Design

Experimental Design
See AEA-RCT-00015

Our primary outcome data are obtained from the 2013 in-person survey and callback surveys conducted on a regular basis from 2016 to 2023 by Duflo, Dupas and Kremer (2023) and Duflo et al. (2024). We added two sets of questions in 2023 to collect information on parental and teacher investment and self-efficacy, which may be pathways for skin tone to yield disparities in outcomes. Each question is asked on a 5-point scale from Strongly Disagree to Strongly Agree, and we will convert these responses to binary variables (one if the respondent Strongly Agrees or Agrees). These newly added questions are listed above under "secondary outcomes (explanation)".
Experimental Design Details
Not available
Randomization Method
randomization done in office by a computer
Randomization Unit
Individual
Was the treatment clustered?
No

Experiment Characteristics

Sample size: planned number of clusters
N/A
Sample size: planned number of observations
Photographs were taken of participants at baseline (2008) and again at midline (2013) to help facilitate tracking for future surveys. In summer 2023, participants were contacted to obtain consent for these photographs to be used for analysis. Though 2,064 participants were in the original study, we only were able to reach 1,659 (81%) to ask their consent to use their photo for this study. Of those, only 1,578 consented (76% of the overall sample). We have skin tone scores for 1,243 students in 2008, 1,313 in 2013. For 1,042 students, we have scores for both 2008 and 2013. The gap between the consented number and the recorded number come from cases where we could not find the correct image for that participant. This study will focus on the sample of respondents who provided consent and whose picture could be found. If the consent rate is not balanced by treatment status, we will use entropy balancing to reweight the sample for analysis.
Sample size (or number of clusters) by treatment arms
The initial sample was 1/3 T, 1/3 C. We have not yet matched the pictures to the treatment status so we do not know the breakdown for the subset that consented and for whom a picture is available.
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
IRB

Institutional Review Boards (IRBs)

IRB Name
MIT COUHES
IRB Approval Date
2023-04-18
IRB Approval Number
0610001931
Analysis Plan

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