AEA RCT Registry

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Field	Before	After
Trial Status	in_development	on_going
Last Published	December 07, 2022 06:52 AM	March 16, 2023 05:48 AM
Intervention (Public)	The experiment will involve sending monthly information to households for four months in short rain seasons when the temperature is high (November, December, January, and February) and in dry seasons (August, September, and October). Wards from Dar es Salaam will be randomly assigned into treatments and control groups. We will have two treatment and one control group. In the first treatment group, households will receive information regarding their own water consumption for that month in a comparison with the median average neighborhood water consumption in the ward that the household is living. In the second treatment, information will be given showing how they should save water like turning off taps while brushing teeth, soaping during the bath, and handwashing, inserting a water meter valve, direct water into the storage tank/well before using, etc. The control group will only continue to receive their normal monthly water bills without extra information.	The experiment will involve sending monthly information to households for six months (January, February, March, April, May and June 2023). Wards from Dar es Salaam will be randomly assigned into treatment and control group. We will have one treatment and one control group. In the treatment group, households will receive information regarding their own water consumption for that month in a comparison with the median average neighborhood water consumption in the ward that the household is living. The control group will only continue to receive their normal monthly water bills without extra information.
Intervention Start Date	November 24, 2022	January 24, 2023
Intervention End Date	October 24, 2023	June 24, 2023
Experimental Design (Public)	The targeted population for the study is high water users who are connected with the water authority. A total of 256,661 households are connected to water excluding inactive and disconnected customers. We use the median value to obtain high water users. Any household that is above the median water consumption will be considered a high user. Households with bulk meters such as flats and institutional apartments are treated as outliers and hence are not part of the study. To avoid spillover effects, randomization will be done at the cluster level. For this case, wards will be used as clusters. In Dar es Salaam, we have more than 50 wards, hence a minimum number of clusters is guaranteed. To check for the orthogonality assumption, balance tests will be used. The variables that will be considered for balance tests include average monthly household water consumption, average daily water consumption per person, collection value prior baseline survey and household size, age, education and household income, after the baseline survey	The targeted population for the study is high water users who are connected with the water authority. A total of 256,661 households are connected to water excluding inactive and disconnected customers. We use the median value to obtain high water users. Any household that is above the median water consumption will be considered a high user. Households with bulk meters such as flats and institutional apartments are treated as outliers and hence are not part of the study. To avoid spillover effects, randomization will be done at the cluster level. For this case, wards will be used as clusters. In Dar es Salaam, we have more than 50 wards, hence a minimum number of clusters is guaranteed. To check for the orthogonality assumption, balance tests will be used. The variables that will be considered for balance tests include average monthly household water consumption, median monthly water consumption, collection value.
Planned Number of Observations	The planned number of observations is 900 households. In addition, we expect to include some few households who will not be surveyed and this will make a total of 1600 households.	The planned number of observations is 1600 households. In addition, we expect to survey 900 households out of 1600 to gather more information.
Sample size (or number of clusters) by treatment arms	We expect to have 40 wards as control group and 40 wards in treatment group.	We expect to have 40 wards in control group and 40 wards in treatment group.