Consumer BehaviorNCT04454944
Understanding Adoption for Clean Cookstoves: A Demand Study
A study testing LPG subsidy and Distance allocation in people with Consumer Behavior, run by Columbia University at 2 sites in 2 countries.
Trial summary
The aim of the Adoption study is to determine how best to encourage people to adopt clean cookstoves in order to diminish the global health risk of household air pollution. The study harnesses an existing cohort in Ghana to study factors that increase the adoption of clean cookstoves, and to test strategies to promote… Read more about this study
- Who is it for?
- Ages 18 years and older, women onlyHealthy volunteers can take part
- Conditions the study is for
- Consumer Behavior
- What is being tested?
- LPG subsidy and Distance allocation
- Type of treatment
- Lifestyle or therapy programme
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 890 participants
- Where
- 2 sitesin 2 countries
- Study dates
- 15 Feb 2021to 11 Nov 2021
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- Women only
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- Female
- 18 years of age or older
- Primary cook of the household
- Part of the Ghana Randomized Air Pollution and Health Study (GRAPHS) sample or reside in a sample village
- Owns an LPG stove and cylinder (provided by the project in the case of newly recruited households)
Who cannot join
- Temporarily residing in study area.
Trial locations and contacts
2 sites in 2 countries.
2 sites in 2 countries
United States1 site
Columbia University Medical Center
New York, New York, 10032
About this study
Official title: Understanding Adoption of Clean Cookstoves
The aim of the Adoption study is to determine how best to encourage people to adopt clean cookstoves in order to diminish the global health risk of household air pollution. The study harnesses an existing cohort in Ghana to study factors that increase the adoption of clean cookstoves, and to test strategies to promote adoption and continued use. Limited past research has shown that the demand for clean cookstoves is low, and that households continue to use traditional hearths even when they have clean cookstoves. This behavior threatens to undermine clean cookstove intervention programs, such as those promoted by the Global Alliance for Clean Cookstoves. The proposed study aims to ascertain the demand curve for liquified petroleum gas (LPG) in the Kintampo North Municipality and South district.
Read the detailed description
The study will assess if demand for LPG in rural settings in Ghana is price elastic - and by how much - by providing different levels of LPG price subsidies. It will also ascertain if demand is influenced by distance by allocating participants to varying distances to points of LPG supply. Finally, it will assess factors that could affect the demand for LPG such as availability and price of other fuels for cooking, and income levels.
In particular the objectives of the study are:
- To determine if demand for LPG is price elastic
- To determine if demand for LPG is influenced by distance
- To ascertain what other factors aside the price of LPG, and distance to point of LPG supply, determine the demand for LPG
- To document the successes and challenges of introducing a subsidy for LPG in rural settings
- Conditions
- Consumer Behavior
- Being tested
- LPG subsidy, Distance allocation
- Medical subject headings
- Consumer Behavior
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
LPG subsidyBehavioural
Different subsidy rates, ranging between 0% and 100% (listed below) will be written on cards. Individuals will randomly select a card to display the subsidy rate for each household. The card will be concealed with a scratch-off sticker, with a higher likelihood of drawing a high price (low subsidy) than a low price (high subsidy) given that take up will be higher in the latter group.
Distance allocationBehavioural
We will set up fuel supply depots to increase the convenience and lower costs and hassle associated with traveling to an established filling station. The supply depots will mirror a recirculation model of LPG distribution currently being piloted by the National Petroleum Authority of Ghana. Households will be randomly assigned to one of the supply depots in advance or to continue refilling their cylinder at the filling station.
| Study group | Role | What they receive |
|---|---|---|
| Control | No intervention | All individuals in each arm will have a well-functioning LPG cookstove and gas cylinder. Participants in the control arm will receive no other intervention. |
| No subsidy, distance variation | Experimental | All individuals in each arm will have a well-functioning LPG cookstove and gas cylinder. This intervention arm will receive an assigned depot where they have to make liquefied petroleum gas (LPG) purchases. Receives: Behavioral: Distance allocation |
| Subsidy, no distance variation | Experimental | All individuals in each arm will have a well-functioning LPG cookstove and gas cylinder. This intervention arm receives a price subsidy on liquefied petroleum gas (LPG) purchases. Receives: Behavioral: LPG subsidy |
| Subsidy, distance variation | Experimental | All individuals in each arm will have a well-functioning LPG cookstove and gas cylinder. This intervention arm receives a price subsidy on liquefied petroleum gas) (LPG) purchases an assigned depot where they have to make liquefied petroleum gas (LPG) purchases. Receives: Behavioral: LPG subsidy; Behavioral: Distance allocation |
What is being measured
The primary outcome is the main question the study is designed to answer.
Demand for LPG
The primary outcome will be measured by the number of LPG cylinder purchases and/or refills by the study participant.
Measured: 6 months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted2 Jul 2020
- Study start15 Feb 2021
- Primary completion11 Nov 2021
- Study completion11 Nov 2021
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Consumer BehaviorStudies of the same condition, open and under way.
- More trials run by Columbia UniversityThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Other
- Allocation
- Randomised
- Intervention model
- Factorial
- Model description
- Participants were randomized to 5 price levels and to 5 LPG cylinder exchange depots, for a total of 25 possible location/price combinations. Additionally, participants were enrolled into 4 arms (see arms description).
- Masking
- None (open label)
- Enrolment
- 890 participants (actual)
Sponsor and investigators
- Lead sponsor
- Columbia University
- Sponsor type
- University, hospital or other
- Collaborators
- Kintampo Health Research Centre, Ghana, University of California, Santa Barbara
- Responsible party
- Principal investigator, Darby Jack, Columbia University
- Investigators
- Darby Jack, PhD, Principal investigator, Columbia University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT04454944
- Sponsor's protocol ID
- AAAS9921
- Status last verified
- Feb 2024
- First submitted
- 29 Jun 2020
- Last updated
- 28 Feb 2024
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Yes: De-identified participant data will be shared between the study teams at the Kintampo Health Research Center, Columbia University and University of California, Santa Barbara. This data will not include medical or clinical information. We plan to create a public use de-identified dataset that will be made available via the Ghana Open Data Initiative or a similar repository.
Study at a glance
From the registry record, last updated by the sponsor on 28 Feb 2024. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Understanding Adoption of Clean Cookstoves
- ClinicalTrials.gov ID
- NCT04454944
- Acronym / sponsor ID
- AAAS9921
- Conditions
- Consumer Behavior
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 890 participants (actual)
- Lead sponsor
- Columbia UniversityUniversity, hospital or other
- Collaborators
- Kintampo Health Research Centre, Ghana, University of California, Santa Barbara
- Study start
- 15 Feb 2021 (actual)
- Primary completion
- 11 Nov 2021 (actual)
- Study completion
- 11 Nov 2021 (actual)
- First posted
- 2 Jul 2020 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The aim of the Adoption study is to determine how best to encourage people to adopt clean cookstoves in order to diminish the global health risk of household air pollution. The study harnesses an existing cohort in Ghana to study factors that increase the adoption of clean cookstoves, and to test strategies to promote adoption and continued use. Limited past research has shown that the demand for clean cookstoves is low, and that households continue to use traditional hearths even when they have clean cookstoves. This behavior threatens to undermine clean cookstove intervention programs, such as those promoted by the Global Alliance for Clean Cookstoves. The proposed study aims to ascertain the demand curve for liquified petroleum gas (LPG) in the Kintampo North Municipality and South district.
Detailed description
The study will assess if demand for LPG in rural settings in Ghana is price elastic - and by how much - by providing different levels of LPG price subsidies. It will also ascertain if demand is influenced by distance by allocating participants to varying distances to points of LPG supply. Finally, it will assess factors that could affect the demand for LPG such as availability and price of other fuels for cooking, and income levels.
In particular the objectives of the study are:
- To determine if demand for LPG is price elastic
- To determine if demand for LPG is influenced by distance
- To ascertain what other factors aside the price of LPG, and distance to point of LPG supply, determine the demand for LPG
- To document the successes and challenges of introducing a subsidy for LPG in rural settings
Study design
- Primary purpose
- Other
- Allocation
- Randomised
- Intervention model
- Factorial
- Masking
- None (open label)
- Number of arms
- 4
- Model description
- Participants were randomized to 5 price levels and to 5 LPG cylinder exchange depots, for a total of 25 possible location/price combinations. Additionally, participants were enrolled into 4 arms (see arms description).
| Arm | Type | Receives |
|---|---|---|
| Control | No intervention | –All individuals in each arm will have a well-functioning LPG cookstove and gas cylinder. Participants in the control arm will receive no other intervention. |
| No subsidy, distance variation | Experimental | Behavioral: Distance allocationAll individuals in each arm will have a well-functioning LPG cookstove and gas cylinder. This intervention arm will receive an assigned depot where they have to make liquefied petroleum gas (LPG) purchases. |
| Subsidy, no distance variation | Experimental | Behavioral: LPG subsidyAll individuals in each arm will have a well-functioning LPG cookstove and gas cylinder. This intervention arm receives a price subsidy on liquefied petroleum gas (LPG) purchases. |
| Subsidy, distance variation | Experimental | Behavioral: LPG subsidy, Behavioral: Distance allocationAll individuals in each arm will have a well-functioning LPG cookstove and gas cylinder. This intervention arm receives a price subsidy on liquefied petroleum gas) (LPG) purchases an assigned depot where they have to make liquefied petroleum gas (LPG) purchases. |
Who may qualify
- Ages
- 18 years and older
- Sex
- Female only
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (5 listed)
- Female
- 18 years of age or older
- Primary cook of the household
- Part of the Ghana Randomized Air Pollution and Health Study (GRAPHS) sample or reside in a sample village
- Owns an LPG stove and cylinder (provided by the project in the case of newly recruited households)
Key exclusion criteria (1 listed)
- Temporarily residing in study area.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| LPG subsidyDifferent subsidy rates, ranging between 0% and 100% (listed below) will be written on cards. Individuals will randomly select a card to display the subsidy rate for each household. The card will be concealed with a scratch-off sticker, with a higher likelihood of drawing a high price (low subsidy) than a low price (high subsidy) given that take up will be higher in the latter group. | Behavioural | Subsidy, distance variation, Subsidy, no distance variation |
| Distance allocationWe will set up fuel supply depots to increase the convenience and lower costs and hassle associated with traveling to an established filling station. The supply depots will mirror a recirculation model of LPG distribution currently being piloted by the National Petroleum Authority of Ghana. Households will be randomly assigned to one of the supply depots in advance or to continue refilling their cylinder at the filling station. | Behavioural | No subsidy, distance variation, Subsidy, distance variation |
Primary outcome
Demand for LPG
Time frame: 6 months
The primary outcome will be measured by the number of LPG cylinder purchases and/or refills by the study participant.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 28 Feb 2024.
- Individual participant dataSharing planned: Yes. De-identified participant data will be shared between the study teams at the Kintampo Health Research Center, Columbia University and University of California, Santa Barbara. This data will not include medical or clinical information. We plan to create a public use de-identified dataset that will be made available via the Ghana Open Data Initiative or a similar repository.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Darby Jack, PhD principal investigator
Columbia University
2 sites in 2 countries: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing LPG subsidy and Distance allocation in people with Consumer Behavior, run by Columbia University at 2 sites in 2 countries.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 5 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 28 Feb 2024. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 2 sites in United States, Ghana. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Demand for LPG (time frame: 6 months). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 28 Feb 2024.