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Field
Last Published
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Before
March 08, 2024 03:02 PM
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After
March 19, 2024 10:46 AM
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Field
Randomization Unit
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Before
At the farmer level. We stratify the sample by (1) gender, (2) age greater than or equal to 55, (3) land size greater than or equal to 5 acres, and (4) community (20 communities in Nkawkaw and 10 communities in Sefwi Bekwai). This leads to 133 strata in Nkawkaw after dropping strata with fewer than 6 farmers; There are 80 strata in Sefwi Bekwai and the strata with fewer than 6 farmers are kept and randomly assigned to each treatment arm, in order to maintain a reasonable sample size.
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After
At the farmer level. We stratify the sample by (1) gender, (2) age greater than or equal to 55, (3) land size greater than or equal to 5 acres, and (4) community (20 communities in Nkawkaw and 10 communities in Sefwi Bekwai). This leads to 128 strata in Nkawkaw after dropping strata with fewer than 6 farmers; There are 80 strata in Sefwi Bekwai and the strata with fewer than 6 farmers are kept and randomly assigned to each treatment arm, to maintain a reasonable sample size.
The total number of strata in Nkawkaw was updated from 133 to 128. The update reflects the necessary sample replacement of the first 7 communities to address an implementation error in demonstrating game harvest in the control group. As a correction, the entire sample of six treatment arms in these 7 affected communities was replaced with another 6 communities following the same sample selection of large-size communities and farmers. Within these 6 new communities, we stratified the sample and randomly assigned farmers per community into six treatment arms in the same way. Consequently, 44 strata from the initial 7 communities were dropped and substituted with 39 strata from 6 new communities. This adjustment leads to slight variations in the sample size per arm.
This is updated after the experiment but before completing data collection.
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Field
Planned Number of Clusters
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Before
1627 farmers in Nkawkaw and 744 farmers in Sefwi Bekwai
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After
1571 farmers in Nkawkaw and 744 farmers in Sefwi Bekwai
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Field
Planned Number of Observations
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Before
2 observations per farmer, which leads to 3254 observations at the land level in total for Nkawkaw, and 1488 observations for Sefwi Bekwai
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After
2 observations per farmer, which leads to 3142 observations at the land level in total for Nkawkaw, and 1488 observations for Sefwi Bekwai
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Field
Sample size (or number of clusters) by treatment arms
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Before
T1: Standard PES only: 390 farmers (266 from Nkawkaw, 124 from Sefwi Bekwai)
T2: Variable PES only: 392 farmers (274 from Nkawkaw, 118 from Sefwi Bekwai)
T3: Market-based PES only: 403 farmers (277 from Nkawkaw, 126 from Sefwi Bekwai)
T4: Variable PES + Information: 393 farmers (273 from Nkawkaw, 120 from Sefwi Bekwai)
T5: Market-based PES + Information: 401 farmers (269 from Nkawkaw, 132 from Sefwi Bekwai)
Control: 390 farmers (268 from Nkawkaw, 122 from Sefwi Bekwai)
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After
T1: Standard PES only: 384 farmers (260 from Nkawkaw, 124 from Sefwi Bekwai)
T2: Variable PES only: 386 farmers (268 from Nkawkaw, 118 from Sefwi Bekwai)
T3: Market-based PES only: 390 farmers (264 from Nkawkaw, 126 from Sefwi Bekwai)
T4: Variable PES + Information: 375 farmers (255 from Nkawkaw, 120 from Sefwi Bekwai)
T5: Market-based PES + Information: 392 farmers (260 from Nkawkaw, 132 from Sefwi Bekwai)
Control: 386 farmers (264 from Nkawkaw, 122 from Sefwi Bekwai)
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