Long-Term Diffusion and Impact of Flood-Tolerant Rice in India
Last registered on May 19, 2017

Pre-Trial

Trial Information
General Information
Title
Long-Term Diffusion and Impact of Flood-Tolerant Rice in India
RCT ID
AEARCTR-0002157
Initial registration date
May 19, 2017
Last updated
May 19, 2017 12:47 PM EDT
Location(s)

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Primary Investigator
Affiliation
Other Primary Investigator(s)
PI Affiliation
Tufts University
PI Affiliation
University of California, Berkeley
Additional Trial Information
Status
On going
Start date
2015-05-01
End date
2017-12-31
Secondary IDs
Abstract
This is a follow-up on two experiments (2011, 2012) conducted to study the flood tolerant rice Swarna Sub-1. In both experiments, farmers in treatment villages were randomly selected to receive 5kg minikits of Swarna Sub-1 seeds. The study attempts to determine the long-run impact of the technology on farmers’ cultivation practices, household investment, welfare and on the local economy. (The original study is registered as AEARCTR-0000448.)
External Link(s)
Registration Citation
Citation
Emerick, Kyle, Alain de Janvry and Elisabeth Sadoulet. 2017. "Long-Term Diffusion and Impact of Flood-Tolerant Rice in India." AEA RCT Registry. May 19. https://www.socialscienceregistry.org/trials/2157/history/17794
Experimental Details
Interventions
Intervention(s)
Intervention Start Date
2015-05-01
Intervention End Date
2017-04-17
Primary Outcomes
Primary Outcomes (end points)
Year to year adoption of SS1 rice by kit recipients as well as other farmers; Area cultivated; Changes in production practices-use of inputs; Changes in household investment and welfare; Changes in local price of rice
Primary Outcomes (explanation)
Secondary Outcomes
Secondary Outcomes (end points)
Secondary Outcomes (explanation)
Experimental Design
Experimental Design
Experiment 1: Conducted in 128 villages in 2011, of which 64 were randomly assigned to treatment. In these treatment villages 5 randomly selected farmers among the group of farmers growing Swarna rice were provided 5 kg minikits of Swarna Sub-1 seeds. Control farmers include 10 non-recipient farmers within these 64 treatment villages, and 5 farmers selected in the 64 villages.

Experiment 2: Conducted in 2012 in another 82 villages. 5 kg minikits of SS1 seeds were provided to 5 randomly selected farmers in 2012. In 2013, door to door sale were conducted in 41 of these villages while in the remaining 41, no further supply was provided externally.
Experimental Design Details
Not available
Randomization Method
randomization in Stata
Randomization Unit
Village
Was the treatment clustered?
Yes
Experiment Characteristics
Sample size: planned number of clusters
210 villages
Sample size: planned number of observations
15,169 farmers
Sample size (or number of clusters) by treatment arms
Experiment 1: 128 villages covering 320 kit recipients and 960 control farmers
Experiment 2: 82 villages covering 410 kit recipients and 1151 control farmers (potential buyers)
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
IRB
INSTITUTIONAL REVIEW BOARDS (IRBs)
IRB Name
UC Berkeley
IRB Approval Date
2015-08-12
IRB Approval Number
2011-05-3208