Do Social Norms affect Labour Supply and Preferences for Job Attributes? Evidence From a Representative Survey Experiment

Last registered on May 30, 2018

Pre-Trial

Trial Information

General Information

Title
Do Social Norms affect Labour Supply and Preferences for Job Attributes? Evidence From a Representative Survey Experiment
RCT ID
AEARCTR-0003021
Initial registration date
May 28, 2018

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
May 30, 2018, 9:47 PM EDT

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

Locations

Region

Primary Investigator

Affiliation
ifo Institut

Other Primary Investigator(s)

PI Affiliation
ifo Institute
PI Affiliation
ifo Institute
PI Affiliation
ifo Institute

Additional Trial Information

Status
In development
Start date
2018-06-04
End date
2021-12-31
Secondary IDs
Abstract
The existence of the gender gap in employment is well established in the economic literature. But why do women work less than men? In this project, we investigate whether gender norms can have an impact on intended labour market participation and preferences for job attributes of adolescents in Germany. We implement a survey experiment among a representative sample of adolescents aged between 14 and 17 years. The treatment group is informed about the social norm according to which mothers should reduce their labour market participation when their children are very young. By comparing responses between the uninformed control group and the treatment group, we evaluate (i) whether information about social norms affects intended labour market participation and preferences for job attributes per se and (ii) whether information about social norms affects the gender gap in intended labour market participation and job attribute preferences.
External Link(s)

Registration Citation

Citation
Grewenig, Elisabeth et al. 2018. "Do Social Norms affect Labour Supply and Preferences for Job Attributes? Evidence From a Representative Survey Experiment." AEA RCT Registry. May 30. https://doi.org/10.1257/rct.3021-1.0
Former Citation
Grewenig, Elisabeth et al. 2018. "Do Social Norms affect Labour Supply and Preferences for Job Attributes? Evidence From a Representative Survey Experiment." AEA RCT Registry. May 30. https://www.socialscienceregistry.org/trials/3021/history/30149
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Experimental Details

Interventions

Intervention(s)
We investigate how information about social norms impacts intended labour market participation and preferences for job attributes of adolescents in Germany. Respondents in the treatment group will be informed about the social norm according to which mothers of young children are expected to reduce their labour market participation. More specifically, they are told that 91 percent of the German population thinks that the mother should reduce her labour market participation when children are still young, whereas only 41 percent think that fathers should do so. After information provision, respondents in the treatment group and in the uninformed control group are asked about their expected labour market participation and their preferences for different job attributes.
Intervention Start Date
2018-06-04
Intervention End Date
2018-07-03

Primary Outcomes

Primary Outcomes (end points)
Our primary outcomes of interest are adolescents’ intended labour market participation and preferences for job attributes.
Primary Outcomes (explanation)
The outcome question on the intended labour market participation is worded as follows:
“Imagine you are 30 years old and have a child between the age of 1 and 6 years with your partner. What do you think, how many hours per week would you like to work to earn money?”
Answers can be provided on a 5-point scale: 0, i.e. not at all; around 10 hours; around 20 hours; around 30 hours; around 40 hours, i.e. full-time
“How many hours per week would you like your partner to work to earn money?”
Again, answers can be provided on a 5-point scale: 0, i.e. not at all; around 10 hours; around 20 hours; around 30 hours; around 40 hours, i.e. full-time

The outcome question on the preferences for job attributes is worded as follows:
“Now, we will talk about the profession you would like to work in later. For the choice of the profession, several things could play a role. How important are the following things for your professional choice?
- The profession can be reconciled well with having children.
- The profession leaves me enough spare time.
- The profession offers good opportunities to work part-time.
- The profession allows to earn a high income.
- The profession offers good career possibilities.
- The profession offers a secure employment (no unemployment).
- The profession is fun.
- The profession is challenging for me.”
Answers can be provided on a 5-point scale: very important, quite important, quite unimportant, very unimportant. In the question on the job attributes, the order of the items is randomized at the individual level to avoid sequence effects.
In that list, we are particularly interested in items related to work-time.

Secondary Outcomes

Secondary Outcomes (end points)
After eliciting the main outcome variables mentioned above, we further elicit respondents’ opinions towards the division of roles between mothers and fathers to investigate potential mediating channels of our treatment.

In addition, we plan to perform heterogeneity analyses with respect to gender and respondents’ prior beliefs.
Secondary Outcomes (explanation)
We elicit adolescents’ opinion towards the division of roles between mothers and fathers as potential mediating channels of the treatment on our primary outcomes of interest. The corresponding question is worded as follows:
“To what extent do you agree with the following statements?
- The society demands that mothers should reduce their labour market participation to care about their children.
- The society demands that fathers should reduce their labour market participation to care about their children.
- Mothers and fathers qualify equally well for caring about their children.
- It is better for the family income if mothers care about the children and fathers go to work.
- I hold the opinion, that mothers whose children are aged between 1 and 6 years, should reduce their labour market participation.
- I hold the opinion, that fathers whose children are aged between 1 and 6 years, should reduce their labour market participation.”

Experimental Design

Experimental Design
We conduct the survey experiment in a sample of 1,000 adolescents between the age of 14 and 17 years. The survey is conducted in cooperation with a renowned German survey institute, KANTAR Public. The recruitment of the adolescents is managed by KANTAR Public, which collects the data via an online platform. That is, our participants answer the survey questions autonomously on their own digital devices. Randomization is carried out by KANTAR Public at the individual level, using a computer.

Our experiment is structured as follows:
Respondents will be randomly assigned to the treatment group (p=0.5) or the control group (p=0.5)

Sequence of events in the treatment group:
1. Belief elicitation about social norms
2. Information provision
3. Elicitation of intended labour market participation (Primary outcome)
4. Elicitation of preferences for job attributes (Primary outcome)
5. Elicitation of opinion towards the division of roles between mothers and fathers (Secondary outcome)

Sequence of events in the control group:
1. Elicitation of intended labour market participation (Primary outcome)
2. Elicitation of preferences for job attributes (Primary outcome)
3. Elicitation of opinion towards the division of roles between mothers and fathers (Secondary outcome)
4. Belief elicitation about social norms

Experimental Design Details
Randomization Method
Randomization is carried out by the survey company KANTAR Public, using a computer.
Randomization Unit
at the individual level
Was the treatment clustered?
No

Experiment Characteristics

Sample size: planned number of clusters
1000
Sample size: planned number of observations
1,000 adolescents in the age between 14 and 17 years
Sample size (or number of clusters) by treatment arms
500 adolescents in the treatment group, 500 in the control group
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
IRB

Institutional Review Boards (IRBs)

IRB Name
Ethics Committee of the University of Munich (LMU)
IRB Approval Date
2018-05-23
IRB Approval Number
2018-04

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