Street Vending

Last registered on November 18, 2022


Trial Information

General Information

Street Vending
Initial registration date
November 15, 2022

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
November 18, 2022, 12:15 PM EST

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



Primary Investigator

Harvard University

Other Primary Investigator(s)

Additional Trial Information

On going
Start date
End date
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
Street vending is an important source of subsistence for the urban poor in developing countries. This study seeks to understand buyer and seller behavior in this market. Specifically, the study examines vendors’ business strategies and how these relate to their beliefs about buyers.
External Link(s)

Registration Citation

Jain, Ronak. 2022. "Street Vending ." AEA RCT Registry. November 18.
Experimental Details


Using experimental variation in seller approach and price quoted, the study tries to understand if and how purchase rates differ between different types of sellers. There is no "treatment" or "intervention" as such and the research seeks to compare purchasing behavior across different passerby groups for child and adult sellers. The PAP gives the details of the randomization design.
Intervention Start Date
Intervention End Date

Primary Outcomes

Primary Outcomes (end points)
Purchase Rates/Sales
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
I randomize whether and which type of buyer a vendor approaches to sell a good to and the price they quote. Randomization is within-vendor. The PAP gives the details of the randomization design.
Experimental Design Details
Not available
Randomization Method
Randomization was pre-programmed in Qualtrics.
Randomization Unit
Randomization is within-vendor. In analysis, all observations across child and adult vendors will be pooled together respectively for comparing purchasing rates of different types of buyers across child and adult vendors. In the analysis, standard errors will be clustered at the vendor level.
Was the treatment clustered?

Experiment Characteristics

Sample size: planned number of clusters
NA (see above)
Sample size: planned number of observations
1000-2000 passersby within each randomization design cell. See PAP for details.
Sample size (or number of clusters) by treatment arms
1000-2000 passersby within each randomization design cell. See PAP for details.
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)

Institutional Review Boards (IRBs)

IRB Name
Harvard University-Area Committee on the Use of Human Subjects
IRB Approval Date
IRB Approval Number
Analysis Plan

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