Market Access and Economic Development: Experimental Evidence from New Bridges in Rwanda

Last registered on May 30, 2024
View Trial History

Pre-Trial

Trial Information

General Information

Title
Market Access and Economic Development: Experimental Evidence from New Bridges in Rwanda
RCT ID
AEARCTR-0013478
Initial registration date
May 23, 2024

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 30, 2024, 3:20 AM EDT

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

Locations

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

Request Information

Primary Investigator

Name
Kevin Donovan
Affiliation
Yale University
Contact Primary Investigator

Other Primary Investigator(s)

PI Name
Wyatt Brooks
PI Affiliation
Arizona State University
Contact Investigator

Additional Trial Information

Status
On going
Start date
2020-04-01
End date
2024-08-01
Keywords
Agriculture
Additional Keywords
JEL code(s)
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
Abstract
In this project, we randomize the construction timing of 150 trail bridges in rural Rwanda.
External Link(s)

Registration Citation

Citation
Brooks, Wyatt and Kevin Donovan. 2024. "Market Access and Economic Development: Experimental Evidence from New Bridges in Rwanda." AEA RCT Registry. May 30. https://doi.org/10.1257/rct.13478-1.0
Sponsors & Partners
Experimental Details

Interventions

Intervention(s)
Randomize construction timing of trail bridges designed to connect rural communities to local markets. Bridges are randomized within district.
Intervention Start Date
2021-04-01
Intervention End Date
2024-04-01

Primary Outcomes

Primary Outcomes (end points)
income, farm productivity, prices
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
Household-level panel data with a staggered roll-out of bridges. Includes 50 long-term control bridges that use engineering requirements to exclude ever constructing a bridge (see Brooks and Donovan, 2020 Econometrica for the same identification strategy). We measure outcomes on villages on the "more" and "less" connected side of the river.
Experimental Design Details
Not available
Randomization Method
Randomization done in office by computer
Randomization Unit
Community
Was the treatment clustered?
No

Experiment Characteristics

Sample size: planned number of clusters
150
Sample size: planned number of observations
Approximately 65,000 person-years
Sample size (or number of clusters) by treatment arms
Stepped-wedge RCT design, so will include controls that eventually get treated.
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
Supporting Documents and Materials

Documents

Document Name
Pilot Results
Document Type
other
Document Description
This document includes the results of the pilot study conducted for this project.
File
Pilot Results

MD5: 9624e2c5ca7b61a2ca5f650d7cd95b75

SHA1: d9bfb95fe0f522f6bfa9e10914a769a834a529fa

Uploaded At: April 23, 2024

IRB

Institutional Review Boards (IRBs)

IRB Name
University of Colorado Boulder
IRB Approval Date
2020-05-08
IRB Approval Number
20-0087
Analysis Plan

Analysis Plan Documents

Please see this paper for details about our pre-analysis plan.

MD5: 99bce54ef3768a9de8f1a94013134375

SHA1: bf6977062f665497235ded64afebbbbbe0a87aa6

Uploaded At: April 23, 2024