Long-Term Diffusion and Impact of Flood-Tolerant Rice in India

Last registered on May 19, 2017


Trial Information

General Information

Long-Term Diffusion and Impact of Flood-Tolerant Rice in India
Initial registration date
May 19, 2017

Initial registration date is when the trial was registered.

It corresponds to when the registration was submitted to the Registry to be reviewed for publication.

First published
May 19, 2017, 12:47 PM EDT

First published corresponds to when the trial was first made public on the Registry after being reviewed.



Primary Investigator


Other Primary Investigator(s)

PI Affiliation
Tufts University
PI Affiliation
University of California, Berkeley

Additional Trial Information

On going
Start date
End date
Secondary IDs
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

Emerick, Kyle, Alain Janvry and Elisabeth Sadoulet. 2017. "Long-Term Diffusion and Impact of Flood-Tolerant Rice in India." AEA RCT Registry. May 19. https://doi.org/10.1257/rct.2157-1.0
Former Citation
Emerick, Kyle, Alain 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


Intervention Start Date
Intervention End Date

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
Randomization Method
randomization in Stata
Randomization Unit
Was the treatment clustered?

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)

Institutional Review Boards (IRBs)

IRB Name
UC Berkeley
IRB Approval Date
IRB Approval Number


Post Trial Information

Study Withdrawal

There is information in this trial unavailable to the public. Use the button below to request access.

Request Information


Is the intervention completed?
Data Collection Complete
Data Publication

Data Publication

Is public data available?

Program Files

Program Files
Reports, Papers & Other Materials

Relevant Paper(s)

Reports & Other Materials