Business and public health impacts of food safety upgrading among pork vendors in Vietnam

Last registered on November 01, 2023
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Pre-Trial

Trial Information

General Information

Title
Business and public health impacts of food safety upgrading among pork vendors in Vietnam
RCT ID
AEARCTR-0012244
Initial registration date
October 22, 2023

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 01, 2023, 2:38 PM EDT

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

Locations

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Primary Investigator

Name
Vivian Hoffmann
Affiliation
IFPRI
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Other Primary Investigator(s)

PI Name
Kate Ambler
PI Affiliation
IFPRI
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PI Name
Mike Murphy
PI Affiliation
IFPRI
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PI Name
Sinh Dang
PI Affiliation
ILRI
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PI Name
Trang Le
PI Affiliation
ILRI
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PI Name
Hung Nguyen
PI Affiliation
ILRI
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PI Name
Fred Unger
PI Affiliation
ILRI
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PI Name
Phuong Nguyen
PI Affiliation
ILRI
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Additional Trial Information

Status
In development
Start date
2023-10-23
End date
2024-08-15
Keywords
Firms & Productivity, Governance, Health
Additional Keywords
food safety, consumer demand, regulation
JEL code(s)
Q18, I18
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
Abstract
We test the impact of a training and voluntary food safety grading intervention on food safety practices and outcomes among pork vendors in 68 traditional wet markets in Vietnam.
External Link(s)

Registration Citation

Citation
Ambler, Kate et al. 2023. "Business and public health impacts of food safety upgrading among pork vendors in Vietnam." AEA RCT Registry. November 01. https://doi.org/10.1257/rct.12244-1.0
Sponsors & Partners

Sponsors

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Experimental Details

Interventions

Intervention(s)
Training of pork vendors in traditional wet markets; enrollment of interested vendors in a voluntary food safety grading program; promotion of the grading program to consumers in these markets.
Intervention Start Date
2023-10-23
Intervention End Date
2024-05-15

Primary Outcomes

Primary Outcomes (end points)
Total bacteria count (logCFU/g)
Salmonella (presence/absence)
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
Index of hygiene practices
Consumers choose vendor based on food safety
Expenditure of vendors on food-safety related inputs
Value of pork sales per hour (as a correlate of hygiene practice index in T vs. C markets)
Secondary Outcomes (explanation)
Consumers' stated reason for selecting vendor is one of: food safety, cleanliness, or high food safety rating
Value of pork sales per hour: natural logarithm of the value of pork sales per hour, based on reported purchase amount at the start of the day, time of the end-of-day vendor interview, and observed pork remaining at the end-of-day interview
Index of hygiene practices: standardized inverse-covariance weighted average (Anderson, 2008)

Experimental Design

Experimental Design
68 pork markets will be randomized to Treatment or Control status. 10 vendors will be enrolled in the study in each Treatment market, 5 vendors will be enrolled in each Control market. A baseline survey will be conducted in each market. Intervention activities will commence in Treatment markets within a week of the baseline survey. Surveillance visits and updating of food safety grades will continue for 3 months. Follow-up data collection will be conducted approximately 3 months after baseline data collection. A second follow-up round of data collection may be conducted after an additional 3 months, subject to funding availability.
Experimental Design Details
Not available
Randomization Method
Market-level treatment assignment: in office by a computer
Vendor-level treatment assignment: via public drawing in Treatment markets, at the end of the training session
Randomization Unit
Market (for training and offer of enrollment in food safety grading program)
Vendor (for provision of equipment, within Treatment markets)
Was the treatment clustered?
Yes

Experiment Characteristics

Sample size: planned number of clusters
68 markets
Sample size: planned number of observations
510 vendors up to 1020 consumers (15 per market)
Sample size (or number of clusters) by treatment arms
34 markets Treatment, 34 markets Control
170 vendors T1, 170 vendors T2, 170 vendors Control
510 consumers Treatment, 510 Consumers Control
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
Supporting Documents and Materials
IRB

Institutional Review Boards (IRBs)

IRB Name
International Food Policy Research Institute Institutional Review Board
IRB Approval Date
2022-08-31
IRB Approval Number
MTID-22-0846
IRB Name
ILRI Institutional Research Ethics Committee
IRB Approval Date
2023-02-14
IRB Approval Number
ILRI-IREC2022-55
IRB Name
Hanoi University of Public Health
IRB Approval Date
2022-12-22
IRB Approval Number
458/2022/TYCC-HD3
Analysis Plan