Labor supply responses to wages and taxes

Last registered on March 13, 2023


Trial Information

General Information

Labor supply responses to wages and taxes
Initial registration date
March 07, 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
March 13, 2023, 2:59 PM EDT

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



Primary Investigator

Monash University

Other Primary Investigator(s)

PI Affiliation
National University of Singapore Business School

Additional Trial Information

In development
Start date
End date
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
There is a long tradition of estimating the labor supply response of individuals to tax changes. Most of the existing literature assumes that people respond to tax changes in the same way that they respond to wage changes. However, people’s perceptions and attitudes towards tax could make their labor supply respond differently to tax changes versus wage changes. Specifically, if a person dislikes that their tax money goes to fund public goods they do not agree with or is “wasted” by the government, the labor supply response estimated through tax rates could reflect this aversion towards their labor earnings funding an undesirable activity. The opposite could also be true where people recognize that taxes fund public goods that bring benefits to themselves or others and thus might be willing to forego some consumption to fund taxes. This project will clarify and empirically investigate the potential difference between labor supply responses to wage and tax changes. To this end, we run a large-scale online survey and randomized vignette experiments on a representative U.S. sample.
External Link(s)

Registration Citation

Chirakijja, Janjala and Pinchuan Ong. 2023. "Labor supply responses to wages and taxes." AEA RCT Registry. March 13.
Experimental Details


Intervention Start Date
Intervention End Date

Primary Outcomes

Primary Outcomes (end points)
Labor supply responses to wages and taxes, Views on income tax and the government.
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
We field a vignette experiment embedded in an online survey, conducted on a sample of US residents. Respondents are presented with multiple pairs of hypothetical job scenarios. In each pair, respondents will be asked whether they would take up the job in each scenario and which of the two scenarios they prefer. The information for each of the three features of a job scenario is randomized. The survey will also collect respondents' demographic and employment characteristics, political views, and perceptions of tax policies.

Experimental Design Details
Randomization Method
The randomization is done by the survey platform (Qualtrics).
Randomization Unit
Was the treatment clustered?

Experiment Characteristics

Sample size: planned number of clusters
5000 Individuals
Sample size: planned number of observations
100,000 observations at the scenario level. (Each of the 5,000 respondents is presented with 20 vignette scenarios).
Sample size (or number of clusters) by treatment arms
5.4 observations per each unique vignette scenario (i.e., each wage-hour-tax combination).
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)

Institutional Review Boards (IRBs)

IRB Name
Faculty Ethics Review Committee NUS Business School
IRB Approval Date
IRB Approval Number


Post Trial Information

Study Withdrawal

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Is the intervention completed?
Data Collection Complete
Data Publication

Data Publication

Is public data available?

Program Files

Program Files
Reports, Papers & Other Materials

Relevant Paper(s)

Reports & Other Materials