Wage posting practices in online job boards

Last registered on November 15, 2024
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Pre-Trial

Trial Information

General Information

Title
Wage posting practices in online job boards
RCT ID
AEARCTR-0014715
Initial registration date
November 05, 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
November 15, 2024, 1:33 PM EST

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

Locations

Country
France
Region

Primary Investigator

Name
Giulia Giupponi
Affiliation
Bocconi University
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Other Primary Investigator(s)

PI Name
Thomas Le Barbanchon
PI Affiliation
Bocconi University
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PI Name
Attila Lindner
PI Affiliation
University College London
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PI Name
Fabien Postel-Vinay
PI Affiliation
University College London
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Additional Trial Information

Status
In development
Start date
2024-11-07
End date
2024-12-31
Keywords
Firms & Productivity, Labor
Additional Keywords
job posting, wage setting protocols, bargaining
JEL code(s)
J23, J30, J63
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
Abstract
We are interested in understanding recruiters’ practices in online job vacancy posting. We will examine what factors influence recruiters’ decisions regarding whether and how to advertise compensation. Using randomized information treatments, we will study how knowledge of the prevalence and recruitment impacts of different wage posting and wage setting practices affects the probability that recruiters post compensation-related information and their wage setting strategies.
External Link(s)

Registration Citation

Citation
Giupponi, Giulia et al. 2024. "Wage posting practices in online job boards." AEA RCT Registry. November 15. https://doi.org/10.1257/rct.14715-1.0
Sponsors & Partners

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Experimental Details

Interventions

Intervention(s)
We will run an online survey of recruiters posting on the French public employment service platform France Travail. The survey instrument includes experiments in the form of randomized information treatments. These will provide information about the prevalence and recruitment impacts of different wage posting and wage setting practices. The experiments rely on the provision of truthful information.
Intervention (Hidden)
We provide here more detail on how we intend to conduct our three information experiments. For experiment (a), we will randomize information about the share of recruiters in the local labor market who post wage information. For experiment (b), we will randomize information on the impact of posting wage information on the speed of vacancy filling. For experiment (c), we will randomize information on the share of candidates who tried to negotiate over compensation or other contractual conditions. In order to provide truthful information, we estimate the relevant statistics in survey or administrative data. We will then (i) elicit the impact of information provision on the stated intention to post a wage or engage in negotiation in subsequent recruiting rounds and (ii) monitor actual wage posting behavior on France Travail over the year following the survey experiment.
Intervention Start Date
2024-11-07
Intervention End Date
2024-12-31

Primary Outcomes

Primary Outcomes (end points)
1/ Likelihood of posting compensation-related information in subsequent recruiting rounds
2/ Likelihood of engaging in negotiation over contractual conditions with candidates in subsequent recruiting rounds
Primary Outcomes (explanation)
Key outcomes will be collected in two ways. First, we will use the survey to collect recruiters’ stated intentions about wage posting and negotiation in subsequent recruiting rounds. Second, we will directly monitor the wage posting behavior in subsequent job postings posted on the France Travail platform.

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
The survey will be administered by France Travail to recruiters posting on their website. The survey instrument consists of (i) multiple-choice questions on the determinants of wage posting and wage setting practices, and (ii) three survey experiments in which respondents are randomly provided information about the prevalence and recruitment impacts of different wage posting and wage setting practices, and then asked about wage posting and setting behavior in future recruitment rounds.
Experimental Design Details
Randomization Method
Randomization done by survey software
Randomization Unit
Job posting
Was the treatment clustered?
No

Experiment Characteristics

Sample size: planned number of clusters
2,000 recruiters (one per job posting)
Sample size: planned number of observations
2,000 recruiters (one per job posting)
Sample size (or number of clusters) by treatment arms
500 in control, 500 treatment arm a, 500 treatment arm b, 500 treatment arm c
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
Supporting Documents and Materials
IRB

Institutional Review Boards (IRBs)

IRB Name
Ethics Committee of Bocconi University
IRB Approval Date
2024-09-10
IRB Approval Number
RA000730
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