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The Impact of a Bundle of Agricultural and Household Products on Farmer Welfare
Last registered on November 22, 2019

Pre-Trial

Trial Information
General Information
Title
The Impact of a Bundle of Agricultural and Household Products on Farmer Welfare
RCT ID
AEARCTR-0005027
Initial registration date
November 21, 2019
Last updated
November 22, 2019 11:00 AM EST
Location(s)

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Primary Investigator
Affiliation
IDinsight
Other Primary Investigator(s)
PI Affiliation
IDinsight
PI Affiliation
National Institute for Medical Research
PI Affiliation
IDinsight
PI Affiliation
IDinsight
Additional Trial Information
Status
On going
Start date
2019-08-29
End date
2020-12-30
Secondary IDs
Abstract
This study uses a clustered RCT design to evaluate the consumption and income impact of distributing a bundle of cost-effective agricultural, health, and energy products to smallholder farmers in Tanzania. We also examine impacts on a variety of secondary outcomes, including utilization of the products within the bundle, the value of household assets, and minimum acceptable diet among young children. Outcomes are measured approximately one year after the distribution of the bundle to treatment households.
External Link(s)
Registration Citation
Citation
Erasto Kazyoba, Paul et al. 2019. "The Impact of a Bundle of Agricultural and Household Products on Farmer Welfare." AEA RCT Registry. November 22. https://doi.org/10.1257/rct.5027-1.0.
Experimental Details
Interventions
Intervention(s)
The intervention provides a bundle of agricultural, health, and energy products to rural households free of charge.
Intervention Start Date
2019-10-25
Intervention End Date
2020-12-30
Primary Outcomes
Primary Outcomes (end points)
1. Net income directly generated from products included in the Direct Giving bundle during the first nine months after households receive the bundle
2. One month non-durable household consumption measured nine months (endline) after the intervention
Primary Outcomes (explanation)
1. Net income directly generated from products included in the Direct Giving bundle during the first nine months after households receive the bundle, aggregated as the sum of:
• Net income from maize profits
• Total value of maize harvest – expenditure on agricultural inputs
• Total chicken net income
• Total value of chickens owned at endline + total revenues from chicken + value of eggs produced – expenditure on caring for chickens
• Income and expenditure savings on energy
• Estimated value of solar lamp at endline + revenues from charging others’ phones - expenditures on home lighting and phone charging
A net income figure will be calculated for each household by summing the various net income input measurements collected during the endline survey and monthly surveys. Values for time periods in which data for a given profit input is unavailable will be linearly extrapolated.
We only consider maize in the primary outcome measurement, since based on product test data we do not expect the Direct Giving bundle to impact profits for other crops. However, we will still collect data at endline on inputs and outputs for non maize crops to check this assumption.
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2. One month non durable household consumption measured nine months (endline) after the intervention, aggregated as the sum of:
• Value of own produced food consumed
• Expenditure on food consumed outside of home
• Expenditure on temptation goods (alcohol, gambling, etc.)
• Expenditure on miscellaneous household items (e.g., soap, DVDs, insecticides)
• Infrequent consumption (e.g., medical, fees and taxes, field rent)
Note that the consumption outcome will not include spending on light-related energy, since we expect the intervention—specifically, the solar lamp—to reduce energy spending.
Consumption impacts measured at endline will be linearly extrapolated to the month level to estimate consumption impact during the month prior to the endline survey.
Secondary Outcomes
Secondary Outcomes (end points)
1. Average monthly household consumption across the first 12 months post distribution
2. Total value of household assets after nine months
3. Minimum acceptable diet among children between the ages of six month and 23 months
4. Utilization of products included in the Direct Giving bundle
5. Expected net income over tree lifetime from the tree seedlings included in the Direct Giving bundle, modeled using data from farmers already growing trees in Singida and initial endline data from treatment group farmers
Secondary Outcomes (explanation)
1. Average monthly household consumption across the first 12 months post distribution
• Value of own produced food consumed
• Expenditure on food consumed outside of home
• Expenditure on temptation goods
• Expenditure on miscellaneous household items (e.g., soap, DVDs, insecticides)
• Infrequent consumption (e.g., medical, fees and taxes, field rent)
• Durable goods (i.e., the asset items listed below)
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2. Total consumption from each month (among the households that were randomly chosen to be administered a consumption survey that month) will be used as a separate observation to estimate treatment’s impact on average monthly consumption across the 12 months of data collection. We will also calculate impacts on consumption for each specific month.
• Total value of household assets after nine months, aggregated as the sum of the values of:
• Bicycles
• Motorcycles
• Cars
• Boats
• Computers
• Kerosene stoves
• Radios
• Sewing machines
• Beds
• Tractors
• Mattresses
• LLINs
• Fridges
• Cookstoves
• Water filters
• Pots
• Tables
• Sofas
• Chair
• Cupboards
• Dressers
• Clocks
• Irons
• Televisions
• Mobile phones
• Car batteries
• Farm tools
• Livestock
• Buildings
• Latrines
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3. Minimum acceptable diet among children between the ages of six month and 23 months (measured at endline)
• Proportion of breastfed children age 6–23 months who had at least the minimum dietary diversity and the minimum meal frequency during the previous day
• Non-breastfed children age 6–23 months who received at least two milk feedings and had at least the minimum dietary diversity (not including milk feeds) and the minimum meal frequency during the previous day
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4. Utilization of products included in the Direct Giving bundle
• Number of adult hybrid and local chickens
• Number of eggs harvested
• Percentage of children under 5 years sleeping under LLINs
• Percentage of household members sleeping under LLINs
• Crop storage using hermetic bags
• Hybrid maize stored
• Farmers used fertilizer in previous farming season
• Solar lamp usage (for light and mobile charging)
• Trees planted, harvested, and stored
• Quantity of corn/soy blend consumed by each person in the household
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5. Expected net income over tree lifetime from the tree seedlings included in the Direct Giving bundle, modeled using data from farmers already growing trees in Singida and initial endline data from treatment group farmers
Experimental Design
Experimental Design
This study aims to establish causal impact through a cluster-level RCT. Randomization occurs at the village-level. The unit of analysis is the household.
Experimental Design Details
Not available
Randomization Method
Randomization is done in office using Stata.
Randomization Unit
Village
Was the treatment clustered?
Yes
Experiment Characteristics
Sample size: planned number of clusters
192 kikundis (contiguous clusters of 10 households each)
Sample size: planned number of observations
1,920 households
Sample size (or number of clusters) by treatment arms
64 clusters in treatment; 128 clusters in control
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
Calculating for 80% power and a 5% significance level, we have a minimum detectable effect size (MDES), in standard deviations of the outcome, of 0.18 when comparing between the treatment and control groups for outcomes measured at endline.
IRB
INSTITUTIONAL REVIEW BOARDS (IRBs)
IRB Name
Tanzania Commission for Science and Technology
IRB Approval Date
2019-01-16
IRB Approval Number
N/A
Analysis Plan

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