Recent Developments in the European Labor Market

Last registered on September 15, 2023


Trial Information

General Information

Recent Developments in the European Labor Market
Initial registration date
September 12, 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
September 15, 2023, 8:58 AM EDT

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



Primary Investigator

Toulouse School of Economics

Other Primary Investigator(s)

PI Affiliation
University of Bonn and ECONtribute and University of Amsterdam

Additional Trial Information

In development
Start date
End date
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
This project will investigate how workers' labor supply has changed since the pandemic's onset and the underlying reasons for these changes. Individuals may alter/reduce their labor supply patterns for several reasons, e.g., due to (i) continued disruptive childcare/schooling, (ii) incapacity due to Long-Covid, (iii) current employment has become too stressful, or because the pandemic has permanently altered their (iv) preferences governing the trade-off between working hours (i.e., consumption) and leisure, or (v) their job preferences for flexibility. Effective policy-making requires knowledge of what motivations are underlying observed changes in labor supply behavior, as the differing underlying motivations would each require very different policy responses.
This project's second objective addresses how to decrease the labor supply shortage in Germany. Empirical evidence shows that the employed skilled workers have significantly decreased their working hours since the onset of the pandemic, and the average number of hours worked by the employed remains below pre-pandemic levels. Conducting a survey experiment (with various treatments), we aim to find sector-specific solutions. We will investigate how firms could increase their current part-time employees' labor market participation (hours worked). In addition, we explore with an experiment what keeps skilled workers in the "hidden reserve" and how to incentivize them to join the labor force.
External Link(s)

Registration Citation

Assenza, Tiziana and Stefanie J. Huber. 2023. "Recent Developments in the European Labor Market." AEA RCT Registry. September 15.
Experimental Details


Intervention Start Date
Intervention End Date

Primary Outcomes

Primary Outcomes (end points)
Collect data on how workers' labor supply (job/industry/hours worked) has changed since the pandemic's onset and the underlying reasons for these changes. Measure the impact of improved workplace quality conditions or higher wages on individuals' willingness to increase labor market participation and/or hours worked.
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
The information provision survey experiment consists of a control group and four treatment arms. In both control and treated groups, subjects answer a questionnaire to elicit data about their current (post-pandemic) and previous (before the pandemic) situation regarding participation in the labor market and hours worked. All subjects working part-time or voluntarily not participating in the labor market will be randomly assigned to one of the four treatment arms. We aim to study the impact of realistic changes in working conditions (quality or wage) on participants' willingness to increase hours worked or participation in the labor market.
Experimental Design Details
Randomization Method
Computer (online survey)
Randomization Unit
Was the treatment clustered?

Experiment Characteristics

Sample size: planned number of clusters
3000 individuals
Sample size: planned number of observations
3000 individuals
Sample size (or number of clusters) by treatment arms
250 individuals
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)

Institutional Review Boards (IRBs)

IRB Name
Economics and Business Ethics Committee
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