Contracting and quality upgrading: a pilot experiment in Senegal

Last registered on May 19, 2022


Trial Information

General Information

Contracting and quality upgrading: a pilot experiment in Senegal
Initial registration date
August 20, 2020

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
August 21, 2020, 10:18 AM EDT

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

Last updated
May 19, 2022, 12:20 AM EDT

Last updated is the most recent time when changes to the trial's registration were published.



Primary Investigator

University of Chicago

Other Primary Investigator(s)

PI Affiliation
University of Bordeaux and IFPRI
PI Affiliation

Additional Trial Information

On going
Start date
End date
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
Aflatoxin is a serious public health threat in many low-income countries. In Senegal, where groundnuts are a primary crop for both home consumption and export, the problem is particularly critical: strict phytosanitary standards in the EU have closed Senegal’s biggest historical market. We study the roll-out of a new technology to control aflatoxin. In partnership with two farming cooperatives, we implement a randomized trial to test a contracting arrangement for use of the new technology and production of low-aflatoxin groundnuts.
External Link(s)

Registration Citation

Bernard, Tanguy, Joshua Deutschmann and Ouambi Yameogo. 2022. "Contracting and quality upgrading: a pilot experiment in Senegal." AEA RCT Registry. May 19.
Experimental Details


Intervention Start Date
Intervention End Date

Primary Outcomes

Primary Outcomes (end points)
Technology adoption
Primary Outcomes (explanation)
Pickup and use of the new technology, as measured in administrative data

Secondary Outcomes

Secondary Outcomes (end points)
Quality; Commercial behavior
Secondary Outcomes (explanation)
Quality is defined as aflatoxin levels on a groundnut sample collected post-harvest. Commercial behavior is defined based on output allocation by farmers to cooperatives and other buyers.

Experimental Design

Experimental Design
Cluster randomized control trial with cooperative members in Senegal. Treatment group farmers are offered a new contracting arrangement for the production of high-quality groundnuts using a new technology. Control farmers maintain their usual relationship with cooperatives.
Experimental Design Details
Not available
Randomization Method
Randomization done in office prior to baseline launch
Randomization Unit
Clustered at village level
Was the treatment clustered?

Experiment Characteristics

Sample size: planned number of clusters
40 villages in first year
Sample size: planned number of observations
400 farmers in first year
Sample size (or number of clusters) by treatment arms
20 villages control, 20 villages treatment
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
Main outcome is adoption. MDE estimated as 0.04-0.07 percentage points, based on two estimates of control takeup from prior work: 0.10 (SD: 0.31) or 0.5 (SD: 0.5).
Supporting Documents and Materials

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Institutional Review Boards (IRBs)

IRB Name
IRB Approval Date
IRB Approval Number
Analysis Plan

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