Targeting of Youth for Adoption of Improved Agricultural Inputs in Liberia

Last registered on December 04, 2017


Trial Information

General Information

Targeting of Youth for Adoption of Improved Agricultural Inputs in Liberia
Initial registration date
December 03, 2017
Last updated
December 04, 2017, 12:35 PM EST



Primary Investigator

World Bank

Other Primary Investigator(s)

Additional Trial Information

On going
Start date
End date
Secondary IDs
This IE evaluates the impact of subsidized delivery of agricultural inputs on food security and agricultural revenue, particularly focusing on targeting of youth. Within the sample, farmers of varying ages are offered the subsidized seeds and tools and also sent an SMS based e-voucher enabling them to buy rice or fertilizer. The IE studies the impact of these inputs on household outcomes and tests whether youth or more experienced farmers are the best targets for similar programs.
External Link(s)

Registration Citation

Christian, Paul. 2017. "Targeting of Youth for Adoption of Improved Agricultural Inputs in Liberia." AEA RCT Registry. December 04.
Former Citation
Christian, Paul and Paul Christian. 2017. "Targeting of Youth for Adoption of Improved Agricultural Inputs in Liberia." AEA RCT Registry. December 04.
Experimental Details


Intervention Start Date
Intervention End Date

Primary Outcomes

Primary Outcomes (end points)
Agricultural Revenue, adoption of improved agricultural technologies (fertilizer, improved varieties of rice and cassava promoted by SAPEC), redemption of e-vouchers, and household food security as measured by dietary diversity and FIES.
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
Distribution of tools and seeds included in the technical package of inputs from the SAPEC project will be randomly phased in at both a community level and at a farmer level within communities. All farmers who registered in the national government's e-registry of farmers who cultivate rice, cassava, or vegetables are eligible, but the order of communities and farmers within communities will be randomly phased in.
Experimental Design Details
Randomization Method
Stratified randomization written in STATA by the World Bank research team.
Randomization Unit
Electoral areas (an official unit close to a community level) are randomly assigned to treatment in the year of intervention overlapping the IE. Within the electoral areas, eligible farmers were randomly assigned to be enrolled or not in the SAPEC subsidy scheme.
Was the treatment clustered?

Experiment Characteristics

Sample size: planned number of clusters
97 electoral areas
Sample size: planned number of observations
1,100 farmers
Sample size (or number of clusters) by treatment arms
500 farmers receive the subsidy in 50 treatment communities. An additional 100 farmers did not receive the subsidy in these 50 treatment communities. 500 farmers in 47 control communities did not receive the treatment.
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)

Institutional Review Boards (IRBs)

IRB Name
IRB Approval Date
IRB Approval Number


Post Trial Information

Study Withdrawal

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Is the intervention completed?
Data Collection Complete
Data Publication

Data Publication

Is public data available?

Program Files

Program Files
Reports, Papers & Other Materials

Relevant Paper(s)

Reports & Other Materials