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Field
Last Published
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Before
March 15, 2024 04:38 PM
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After
October 22, 2024 04:13 PM
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Field
Intervention (Public)
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Before
This is a methods experiment. We are randomly assigning households in Malawi to be interviewed in-person or by phone. Findings from these two groups will be compared to those from two other groups: those without phones, and those with a phone or access to a phone that are reached via phone tree sampling. This experiment runs alongside an existing food security monitoring survey that is run in many districts of Malawi. Our focus is on the Chikwawa and Nsanje districts.
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After
This is a methods experiment. We are randomly assigning households in Malawi to be interviewed in-person or by phone. Findings from these two groups will be compared to those from two other groups: those without phones, and those with a phone or access to a phone that are reached via phone tree sampling. This experiment runs alongside an existing food security monitoring survey that is run in many districts of Malawi. Our focus is on the Chikwawa and Nsanje districts.
Update October 2024: for the upcoming fourth survey round we will randomly assign respondents in group 3 -- those that were sampled with a traditional face-to-face listing but who have been interviewed over the phone -- to either in-person or phone surveys.
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Field
Randomization Unit
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Before
Households that have phones and are willing to be interviewed by phone are randomly assigned to an in-person survey or a phone survey.
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After
Households that have phones and are willing to be interviewed by phone are randomly assigned to an in-person survey or a phone survey.
Update October 2024: the households in the phone survey group (not the phone tree group) will be randomly assigned to either continue with phone surveying or to be interviewed in person during survey round 4.
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Field
Sample size (or number of clusters) by treatment arms
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Before
800 observations in the phone survey group.
800 observations in the face-to-face survey group, but only a subset of those will have phones and be eligible for the phone survey, and we will not know the exact number until we begin data collection.
There are two other groups involved:
-- The phone tree / snowball group consists of 800 households (400 per district) that we reach through referral sampling with no listing
-- Members of the in-person survey group who do not have phones or consent to phone surveying constitute their own comparison group
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After
800 observations in the phone survey group.
800 observations in the face-to-face survey group, but only a subset of those will have phones and be eligible for the phone survey, and we will not know the exact number until we begin data collection.
There are two other groups involved:
-- The phone tree / snowball group consists of 800 households (400 per district) that we reach through referral sampling with no listing
-- Members of the in-person survey group who do not have phones or consent to phone surveying constitute their own comparison group
Update October 2024: across rounds 1-3 we have interviewed 896 households in the phone survey group, slightly above our initial target. For round 4 we are 50/50 randomly assigning those 896 households to another round of phone surveying (448 households) or an in-person survey (448 households). This randomization is stratified by enumeration area, roof type (metal vs. not metal), and mean value of food security measure (HHS) over rounds 1-3.
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