Demand for Automated Wage Adjustment

Last registered on December 01, 2025

Pre-Trial

Trial Information

General Information

Title
Demand for Automated Wage Adjustment
RCT ID
AEARCTR-0015739
Initial registration date
November 24, 2025

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
December 01, 2025, 11:24 AM EST

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

Locations

Region

Primary Investigator

Affiliation

Other Primary Investigator(s)

PI Affiliation
HBS
PI Affiliation
Carnegie Mellon

Additional Trial Information

Status
Completed
Start date
2025-04-06
End date
2025-10-01
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
Abstract
Many firms face challenges filling job vacancies, with positions often remaining unfilled at or beyond the intended start date. One proposed solution is improving wage-setting to reflect the labor market in-real time. In this study, we assess optimal wage-setting frictions by proposing wage-setting tools that our subjects (hiring managers) can adopt under specified conditions on a staffing platform available to them. Our study will shed light on the determinants of hiring shortfalls, such as informational constraints, adjustment costs, or reference pay frictions.
External Link(s)

Registration Citation

Citation
Hoffman, Mitchell, Felix Koenig and Zoe Zullen. 2025. "Demand for Automated Wage Adjustment." AEA RCT Registry. December 01. https://doi.org/10.1257/rct.15739-1.0
Experimental Details

Interventions

Intervention(s)
Intervention (Hidden)
a) Offer of automated wage setting tools, with randomized features (described below).
b) Randomization of signal order (fill/unfill and large/small pool of potential applicants)
Intervention Start Date
2025-04-06
Intervention End Date
2025-10-01

Primary Outcomes

Primary Outcomes (end points)
Demand for automation tools (described below)
Primary Outcomes (explanation)
This will be a binary variable equal to the share of firms indicating interest in each automated wage adjustment tool.

Secondary Outcomes

Secondary Outcomes (end points)
Perception of tools’ impact on filling position, and cost of filling position

Belief updating (conditional on a signal: filling a job on-time, or not) about candidate pool size, relative market wages, and response of fill-rate to wage adjustments.

Perceived cost of an unfilled job
Secondary Outcomes (explanation)
We ask about beliefs over wage bill cost and fill effects for each tool. Independent of the tools, we elicit beliefs before and after jobs go unfilled and when jobs go unfilled in a market with few or many job seekers. The order of fill/unfill questions and the thick/thin market questions is randomized and cross-randomized between the two groups.

Experimental Design

Experimental Design
We study firms' willingness to adopt particular automated wage adjustment tools we create, and under what conditions. Participating firms are introduced to a set of wage-setting tools and asked to indicate their interest in using each one, under the clear and truthful premise that the staffing firm eliciting this information will use responses to inform the design of their automated wage-setting tools and roll-out of these tools. In other words, respondents are informed that their expressed preferences may influence their experience on the staffing platform they use, creating an incentive-compatible setting.

The main design is a within subject comparison, contrasting the search behavior of a firm when a specific automated wage setting tool is available with their search under current conditions (without wage setting automation) or with an alternative wage setting tool. The tools offered vary along dimensions such as the increment and timing of automated adjustment and the conditions that trigger the adjustment. The order in which the tools appear is randomized across subjects. The available tools are:

AutoIncrease – A baseline automated tool that increases advertised pay by 10% for unfilled positions as the intended start date approaches.

AutoBonus – Similar to AutoPay but frames the increase as a hiring bonus rather than a wage increase.

CompAssist – Automatically raises pay by 10%, with the full cost covered by the staffing platform.

MarketPilot – Triggers a 10% wage increase when the position remains unfilled close to the start date, but only if, in addition, at least 50 qualified workers have seen the position but accepted jobs elsewhere.

We compare demand for market tools, and implied rate of wage adjustments and fill rates, with the no-automation-tool status quo.

To explore mechanisms we test for incomplete information: Whether subjects update about candidate pool size, relative market wages, and response of fill-rate to wage adjustments as a function of whether they fill a job on-time, or not (two hypothetical scenarios that we randomize)

We also elicit the cost of an unfilled job by asking about lost revenue, and willingness to pay a premium to fill by the start time.
Experimental Design Details
Randomization Method
Randomization will occur via Qualtrics.
Randomization Unit
We anticipate there will be around 800-1,000 firms in the experiment (perhaps around 200-300 firms on the focal platform and around 600 on Prolific). This will depend on the share of firms that are willing to participate.
Was the treatment clustered?
Yes

Experiment Characteristics

Sample size: planned number of clusters
Around 800-1,000 hiring managers.
Sample size: planned number of observations
Around 800-1,000 hiring managers.
Sample size (or number of clusters) by treatment arms
Each hiring managers will be asked about 4 types of wage adjustment. All options are shown simultaneously and we randomize the order of the list.
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
IRB

Institutional Review Boards (IRBs)

IRB Name
Harvard University
IRB Approval Date
Details not available
IRB Approval Number
IRB24-1532
IRB Name
Study has received IRB approval. Details not available.
IRB Approval Date
Details not available
IRB Approval Number
Details not available

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