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Field
Last Published
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Before
May 30, 2024 03:37 AM
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After
June 04, 2024 06:34 AM
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Field
Experimental Design (Public)
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Before
Sampling procedure: The study will be carried out in Nigeria. A combination of purposive and simple random sampling will be applied in the selection of households for the study. Enugu, Lagos and Abuja FCT will be purposively selected from the Eastern, Southern and Northern parts of Nigeria. From each of the three States, 20 enumeration areas (EAs) as designated by the National Population Commission and NBS will be randomly selected, giving a total of 60 EAs. Finally, from each of the 20 EAs, 10 households will be randomly selected giving a total sample size of 600 respondents for the study
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After
Sampling procedure: The study will be conducted in two states and the Federal Capital Territory: Enugu, Lagos and FCT Abuja, representing the Eastern, Southern and Northern parts of Nigeria. To ensure a representative sample, we will follow the sampling procedure of proportionate size to randomly sample 20 enumeration areas (EAs) (14 urban EAs and 6 rural EAs) from each of the three States. Enumeration Areas are the primary sampling units designated by the National Population Commission (NPC) and the National Bureau of Statistics (NBS). For each State, 6 rural EAs will be divided into two clusters of 3EAs each to form 1 treated group (TG) and 1 control groups (CG). The same principle will be applied to the urban EAs to form 1 TG and 1 CG. Twelve (12) households will be selected from each of the EAs to give 240 respondents for each State comprising 120 treated households and 120 control households. For the study, we will have a total of 720 respondents comprising two groups, treatment (N = 360) and control (N = 360). A well-structured interviewer-administered questionnaire will be developed and tested for data collection through a pilot survey. Data will be collected using computer-assisted personal interviewing (CAPI) coded into survey solutions.
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Randomization Unit
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Before
Enugu state, Lagos state and Abuja FCT will be purposively selected from the Eastern, Southern and Northern parts of Nigeria. From each of the three States, 20 enumeration areas (EAs) will be randomly selected, giving a total of 60 EAs. Finally, from each of the 20 EAs, 10 households will be randomly selected giving a total sample size of 600 respondents for the study. the EAs are regarded as the clusters. The study will have 60 clusters.
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After
Enugu state, Lagos state and Abuja FCT will be purposively selected from the Eastern, Southern and Northern parts of Nigeria. From each of the three States, 20 enumeration areas (EAs) will be randomly selected, giving a total of 60 EAs. Finally, from each of the 20 EAs, 12 households will be randomly selected giving a total sample size of 720 respondents for the study. the EAs are regarded as the clusters. The study will have 60 clusters.
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Planned Number of Observations
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Before
600 households
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After
720 households
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Sample size (or number of clusters) by treatment arms
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Before
200 households control, 200 treatment 1 and 200 treatment 2
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After
360 households control, 360 treatment
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Field
Intervention (Hidden)
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Before
The study intends to use purposive and simple random sampling in the selection of households for the study. Enugu state, Lagos state and Abuja FCT will be purposively selected from the Eastern, Western and Northern parts of Nigeria. From each of the three States, 20 enumeration areas (EAs) as designated by the national population commission and NBS will be randomly selected, giving a total of 60 EAs. Finally, from each of the 20 EAs, 10 households will be randomly selected giving a total sample size of 600 respondents for the study.
The sampled households will be assigned randomly to three groups, treatment I (N = 200), treatment II (N = 200) and control (N = 200). To test how information provision on carbon taxation influences acceptability, the survey will provide a short text explaining how a carbon tax works in comprehensible terms for different audiences; urban and rural. Treatment group I will only receive this information while the control will not receive any information. To test the preferred use of carbon tax revenues by households that will maximize their acceptability, the treatment group II will receive both information on carbon tax and will be asked to allocate a percentage of the total carbon tax revenues (100%) to each of the five proposed revenue-use options. (funding of environmental projects; revenue transfers only to low-income households; equal revenue transfers to all households as compensation; use half of the revenues to fund environmental projects and the other half to compensate low-income households; and use half of the revenues to fund environmental projects and the other half as equal transfers to compensate all households) as if it was their decision. At the end line, that is after four months, we will retest the acceptability using the same questionnaire. The knowledge of the households about a carbon tax will be reassessed. The survey will ask participants if they would accept a carbon tax if revenues were to be distributed according to their preferred allocation option.
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After
The outcome variable for the study is the acceptability of carbon tax and a dichotomous response of 1 = Yes or 0 = otherwise will be used. The households’ carbon tax knowledge and acceptability at the baseline will be collected using a questionnaire. Participants will be asked to rank their knowledge about a carbon tax using a 4-point scale of 1 = Excellent, 2 = Good, 3 = Fair, and 4 = Poor. To determine how information provision on carbon taxation influences acceptability and to determine the preferred use of carbon tax revenues by households that will maximize their acceptability, the survey will follow a guide by PMR & CPLC (2018) on communicating carbon pricing, by providing a short text explaining how a carbon tax works and the revenue spending in comprehensible terms for different audiences; urban and rural. Only the treatment group will receive this information on carbon tax workings and revenue spending while the control group will not receive any information (treatment). They will be asked to allocate a percentage of the total carbon tax revenues (100%) to each of the four proposed revenue-use options (funding mitigation projects that reduce carbon emissions; funding community adaptation projects to extreme weather occurrences; revenue transfers to low-income households as compensation; and revenue transfers to all households) as if it was their decision. At the end-line survey, after 2 weeks of treatment, we will retest the acceptability of carbon tax by the treatment and control groups using the same questionnaire.
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