Rule enforcement and trust of fresh food vendors

Last registered on September 20, 2021
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Pre-Trial

Trial Information

General Information

Title
Rule enforcement and trust of fresh food vendors
RCT ID
AEARCTR-0008245
Initial registration date
September 19, 2021

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
September 20, 2021, 6:06 PM EDT

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

Locations

Country
Ecuador
Region
Latin America

Primary Investigator

Name
Francisca Granda
Affiliation
Pontificia Universidad Catolica del Ecuador
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Other Primary Investigator(s)

PI Name
Gonzalo Sanchez
PI Affiliation
Escuela Politécnica del Litoral
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PI Name
Philip Keefer
PI Affiliation
Inter-American Development Bank
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Additional Trial Information

Status
In development
Start date
2021-09-20
End date
2021-10-30
Keywords
Behavior
Additional Keywords
public goods, institutions, rule enforcement, collective action
JEL code(s)
H4, 017, O43
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
Abstract
We analyze rule enforcement in a setting of approximately 1200 vendors in 22 traditional fresh food markets in Quito, Ecuador. Markets' operations depend on vendors' payments for collective goods such as water supply, electricity, cleaning, and security guard services. However, the payments go through a complex administrative process and depend on vendors' trust and their rule enforcement preferences. Vendors associations' representatives and municipal agents are in charge of enforcement. The project aims to measure whether providing information about the default rate and the payment process has effects on vendors' preferences on rule enforcement.
External Link(s)

Registration Citation

Citation
Granda, Francisca, Philip Keefer and Gonzalo Sanchez. 2021. "Rule enforcement and trust of fresh food vendors." AEA RCT Registry. September 20. https://doi.org/10.1257/rct.8245-1.0
Sponsors & Partners

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Experimental Details

Interventions

Intervention(s)

Intervention Start Date
2021-09-20
Intervention End Date
2021-09-21

Primary Outcomes

Primary Outcomes (end points)
We want to respond to three questions:
1. What is the effect of information on the average default rates on the four reform preferences?
2. What is the effect of information about the payment process on the four reform preferences?
3. How do these preferences change regarding trust among vendors and on vendors associations' representatives and municipal agents?
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
x
Secondary Outcomes (explanation)
x

Experimental Design

Experimental Design

We planned to have three groups: a control group and two treatment groups. The difference between them is the type of information they receive.
Group 1. They do not receive information. They will respond directly about the four enforcement rules.
Group 2. They receive information about the average market’s default rate.
Grupo 3. They receive information about the payment process.
Experimental Design Details
We planned to have three groups: a control group and two treatment groups. The difference between them is the type of information they receive.
Group 1. They do not receive information. They will respond directly about the four enforcement rules.
Group 2. They receive information about the average market’s default rate.
Grupo 3. They receive information about the payment process.

All markets in Quito with more than 30 vendors are included in the sample. Treatment assignment is random by market: treatment groups within each market are equal-sized. Larger markets are over-sampled.
Randomization Method
Systemic random sampling in each market
Randomization Unit
Vendors
Was the treatment clustered?
No

Experiment Characteristics

Sample size: planned number of clusters
1224 fresh food market vendors
Sample size: planned number of observations
1224 fresh food market vendors
Sample size (or number of clusters) by treatment arms
408
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
Supporting Documents and Materials
IRB

Institutional Review Boards (IRBs)

IRB Name
Comite de Etica de Investigacion Pontificia Universidad Catolica del Ecuador
IRB Approval Date
2021-08-27
IRB Approval Number
15.07.2021
Analysis Plan

Post-Trial

Post Trial Information

Study Withdrawal

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Intervention

Is the intervention completed?
No
Data Collection Complete
Data Publication

Data Publication

Is public data available?
No

Program Files

Program Files
Reports, Papers & Other Materials

Relevant Paper(s)

Reports & Other Materials