| Field | Before | After |
|---|---|---|
| Field Abstract | Before This study investigates belief updating in the context of flood risk in Mozambique. Accurate forecasts and risk information do not always bring about the desired preparedness actions from communities at risk. I develop and test experimentally two video interventions to increase flooding related awareness, worry and preparedness of urban households. The video interventions contain the same information about flood risk, causes, effects, and guidance on preparation, but they differ in the actors conveying the message. While the first video features public officials, in the second video local residents with recent flooding experience present the information by drawing on their own experiences. | After This study investigates the impact of a disaster information campaign designed to raise flood risk perceptions and promote mitigation behavior among vulnerable urban households in Mozambique. The information campaign provided community leaders and households with contextualized, actionable information related to flood risk through videos shown during home visits and text messages. The project evaluates the effect of the interventions on perceptions and behavior, as well as how these changes in behavior reduce flooding and the impact of flooding. |
| Field Last Published | Before December 22, 2021 09:23 AM | After March 28, 2022 05:59 PM |
| Field Intervention (Public) | Before I analyze the impact of two interventions disseminating information through 6-minute videos, a public official video and a experience-based video. The videos are incorporated into questionnaires with the target population and take place from September to November, 2021. The goal of the interventions is to increase the flood risk awareness, worry and preparedness of the participants. The video interventions contain the same information about flood risk, causes, effects, and guidance on preparation. The visuals in the videos alternate between the speakers and (moving) images that help transmit the message. Publicly available images and recordings of local news outlets are used for this purpose. The same visuals are used in both interventions. To promote inclusiveness among all ages and education levels, the standard Portuguese versions of the videos are also dubbed in Chuabo, the main local language. In the public official intervention (treatment 1 or T1) the information is delivered by local government officials (one man and one woman) responsible for disaster risk management. The experience-based intervention (treatment 2 or T2) features two local residents (one man and one woman). The latter actors draw on their recent flooding experience to deliver the information. Finally, to measure the effectiveness of the interventions, I created a placebo video (control or C). This 6-minute video contains general information about the city of Quelimane, its history and main economic activities. The information is delivered by local residents, contains (moving) images, and is also made available in Chuabo. | After Videos I designed two six-minute videos, a public officials video, and a flood victims video. The videos were incorporated into surveys with the target population, which took place from September to November 2021. Both videos contained the same information. The visuals in the videos alternate between the speakers, images, and video recordings that help convey the message. Publicly available images and recordings of local news outlets were used for this purpose. The same visuals were used in both videos. The standard Portuguese versions of the videos were also dubbed in Chuabo, the most common local language, to promote inclusiveness among all ages and education levels. In the public officials video, the information was delivered by local government officials (one man and one woman) responsible for disaster risk management. The flood victims video featured two residents (one man and one woman). These actors drew on their recent flooding experience to deliver the information. Finally, to measure the effectiveness of the interventions, I created a placebo video. This six-minute video contained general information about Quelimane, its history, and its main economic activities. This information was delivered by residents, contained images and video recordings, and was also made available in Chuabo. Text messages I designed a set of six text messages summarizing the key points of the videos. The text messages were sent daily to chiefs and households in selected city blocks from November 19 until November 24, 2021. Please see the pre-analysis plan for more details. |
| Field Primary Outcomes (End Points) | Before Measurements include multiple sources of data: survey questions and behavioral measures based on SMS technology. The in-depth household survey questionnaire is divided into four parts. The first part includes detailed questions about the household’s composition, economic status, access to public services and financial instruments, flooding experience and trust. The second part is the video and the third part includes detailed questions about risk awareness, worry, preparedness, risk and time preferences. The final part of the questionnaire is the behavioral experiment. The chief survey questionnaire excludes the first part, since the necessary context variables such as demographic characteristics and flooding experience are collected during a mapping exercise that precedes these surveys. The chief survey questions mostly differ from the household survey since they are focused on the block in general, not necessarily the chief’s household. Nonetheless, the same topics are covered. The short survey includes questions from across most in-depth household survey sections. Some questions are asked before and others after showing the video. Additionally, it includes questions to determine the respondent's exposure to spillovers. The survey measures are supplemented with a behavioral measures through SMS. After the survey, the respondents receive two different invitations through text messages. The first invitation, offers some useful information about the cyclone warning system currently active in Quelimane. Respondents have to reply ‘yes’ to receive the information. The second invitation asks respondents to send anonymous feedback and suggestions about disaster risk management to the local government. The primary outcomes are survey questions on 1) risk awareness, 2) risk worry and 3) preparation intention, and the behavioral measure through SMS. | After Measurements include multiple sources of data: two rounds of surveys with households and chiefs and surveys conducted during the scale-up visiting of households, a behavioral experiment, behavioral measures based on SMS technology, pictures along drainage canals and at random locations across city blocks, and SAR satellite images. Please see the pre-analysis plan for more details. |
| Field Experimental Design (Public) | Before The experiment has three phases. First, a mapping exercise is conducted for which all city blocks of Quelimane are visited. During these visits the block limits are established and interviews are conducted with the block chiefs. Second, the intervention takes place during the in-depth chief and household interviews in 300 city blocks. Third, the intervention takes place during short interviews with 30 percent of the households in 150 city blocks (subset of original sample). | After The 300 city blocks considered for follow-up data collection can be divided into 6 groups. T0: The control group in which the chief and two households were shown the placebo video T1: The text messages treatment in which the chief and about 30 percent of the households were shown the placebo video and received the treatment text messages. T2: The public officials treatment in which the chief and two households were shown the public officials video T3: The public officials (scale-up) treatment in which the chief and about 30 percent of the households were shown the public officials video and received the treatment text messages. T4: The flood victims treatment in which the chief and two households were shown the flood victims video T5: The flood victims (scale-up) treatment in which the chief and about 30 percent of the households were shown the flood victims video and received the treatment text messages. Please see the pre-analysis plan for more details. |
| Field Randomization Method | Before The city blocks were randomly allocated into the control and two treatment groups stratified by neighborhood using Stata. | After Please see the pre-analysis plan for details. |
| Field Planned Number of Observations | Before 300 city block chiefs, 600 in-depth interviews with household head or spouse and 3562 short interviews with household head or spouse | After Please see the pre-analysis plan for details. |
| Field Sample size (or number of clusters) by treatment arms | Before 100 city blocks per treatment arm for the in-depth interviews and 50 city blocks per treatment arm for the short interviews. | After Please see the pre-analysis plan for details. |
| Field Power calculation: Minimum Detectable Effect Size for Main Outcomes | Before | After Please see the pre-analysis plan for details. |
| Field Additional Keyword(s) | Before Belief updating, Risk information, Urban flooding | After Risk communication, urban flooding, field experiment, Mozambique |
| Field Public analysis plan | Before No | After Yes |
| Field Secondary Outcomes (End Points) | Before An important secondary outcome is the behavioral experiment. An insurance game is played to test the hypothesis that past experiences influence preparation behavior. | After Please see the pre-analysis plan for details. |
| Field | Before | After |
|---|---|---|
| Field Document | Before |
After
riskinfo_pap.pdf
MD5:
0119a42bfafed451588f48c289342cba
SHA1:
36ac76ea4b817b5032e8bd00eff24ca93f9ff924
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| Field Title | Before | After Pre-Analysis Plan |
| Field | Before | After |
|---|---|---|
| Field IRB Name | Before | After The Scientific Council of Nova School of Business and Economics |
| Field IRB Approval Date | Before | After January 04, 2022 |
| Field IRB Approval Number | Before | After N/A |